added airport table, added cased to data flatten to handle []map[string]interface{}

[James-Pickett]

• added airport table
• added case to data flatten to handle []map[string]interface{}
• unit tests

example outputs:

[*]osquery> select * from kolide_airport_util where option = 'scan';
+----------------------------------+--------+-------------------------------+-----------------------------------------------+-------+--------+
| fullkey                          | parent | key                           | value                                         | query | option |
+----------------------------------+--------+-------------------------------+-----------------------------------------------+-------+--------+
| 0/SSID                           | 0      | SSID                          | foo                                           | *     | scan   |
| 0/BSSID                          | 0      | BSSID                         | a0:a0:a0:a0:a0:a0                             | *     | scan   |
| 0/RSSI                           | 0      | RSSI                          | -94                                           | *     | scan   |
| 0/CHANNEL                        | 0      | CHANNEL                       | 44                                            | *     | scan   |
| 0/HT                             | 0      | HT                            | Y                                             | *     | scan   |
| 0/CC                             | 0      | CC                            | ZZ                                            | *     | scan   |
| 0/SECURITY (auth/unicast/group)  | 0      | SECURITY (auth/unicast/group) | RSN(802.1x/AES/AES)                           | *     | scan   |
| 1/SSID                           | 1      | SSID                          | bar                                           | *     | scan   |
| 1/BSSID                          | 1      | BSSID                         | a0:a0:a0:a0:a0:a0                             | *     | scan   |
| 1/RSSI                           | 1      | RSSI                          | -90                                           | *     | scan   |
| 1/CHANNEL                        | 1      | CHANNEL                       | 1                                             | *     | scan   |
| 1/HT                             | 1      | HT                            | Y                                             | *     | scan   |
| 1/CC                             | 1      | CC                            | XX                                            | *     | scan   |
| 1/SECURITY (auth/unicast/group)  | 1      | SECURITY (auth/unicast/group) | RSN(PSK/AES/AES)                              | *     | scan   |
+----------------------------------+--------+-------------------------------+-----------------------------------------------+-------+--------+

[*]osquery> select * from kolide_airport_util where option = 'scan' and query = '/RSSI';
+---------+--------+------+-------+-------+--------+
| fullkey | parent | key  | value | query | option |
+---------+--------+------+-------+-------+--------+
| 0/RSSI  | 0      | RSSI | -91   | /RSSI | scan   |
| 1/RSSI  | 1      | RSSI | -90   | /RSSI | scan   |
+---------+--------+------+-------+-------+--------+

[*]osquery> select * from kolide_airport_util where option = 'getinfo';
+-------------------+--------+-----------------+-------------------+-------+---------+
| fullkey           | parent | key             | value             | query | option  |
+-------------------+--------+-----------------+-------------------+-------+---------+
| 0/agrExtRSSI      | 0      | agrExtRSSI      | 0                 | *     | getinfo |
| 0/agrExtNoise     | 0      | agrExtNoise     | 0                 | *     | getinfo |
| 0/lastAssocStatus | 0      | lastAssocStatus | 0                 | *     | getinfo |
| 0/link auth       | 0      | link auth       | abcdfega          | *     | getinfo |
| 0/BSSID           | 0      | BSSID           | a0:a0:a0:a0:a0:a0 | *     | getinfo |
| 0/state           | 0      | state           | running           | *     | getinfo |
| 0/op mode         | 0      | op mode         | station           | *     | getinfo |
| 0/lastTxRate      | 0      | lastTxRate      | 195               | *     | getinfo |
| 0/SSID            | 0      | SSID            | foo               | *     | getinfo |
| 0/MCS             | 0      | MCS             | 7                 | *     | getinfo |
| 0/NSS             | 0      | NSS             | 2                 | *     | getinfo |
| 0/agrCtlNoise     | 0      | agrCtlNoise     | -94               | *     | getinfo |
| 0/maxRate         | 0      | maxRate         | 217               | *     | getinfo |
| 0/guardInterval   | 0      | guardInterval   | 800               | *     | getinfo |
| 0/channel         | 0      | channel         | 2                 | *     | getinfo |
| 0/agrCtlRSSI      | 0      | agrCtlRSSI      | -54               | *     | getinfo |
| 0/802.11 auth     | 0      | 802.11 auth     | abcd              | *     | getinfo |
+-------------------+--------+-----------------+-------------------+-------+---------+

[*]osquery> select * from kolide_airport_util where option = 'getinfo' and query = '/NSS';
+---------+--------+-----+-------+-------+---------+
| fullkey | parent | key | value | query | option  |
+---------+--------+-----+-------+-------+---------+
| 0/NSS   | 0      | NSS | 2     | /NSS  | getinfo |
+---------+--------+-----+-------+-------+---------+

[directionless]

This looks expectedly hairy. Nice. Let's walk through it tomorrow?

[directionless]

I haven't quite wrapped my head around the tests. Generally, I think the end-to-end tests are good, but in this case, there's enough complexity in the string parsers I'd want unit tests for those.

It's an interesting general question -- a lot of our tables use the general exec-parse-return data pattern, I suspect we want some coherent test approach.

[directionless]

I'd take this as is, though there are some test nits if you wanted to loop back to them