Move "Multiple DB requests" to /experimental

[Lifka]

Hi team,

this PR solves the issue: #123.

Change

GET/syscollector/os -> GET/experimental/syscollector/hardware
GET/syscollector/hardware -> GET/experimental/syscollector/os
GET/syscollector/packages -> GET/experimental/syscollector/packages

Add

Opcion experimental_feature in config.js. Value by default: false.

Sample

experimental_features = false

$ curl -u foo:bar -k -X GET "http://127.0.0.1:55000/experimental/syscollector/packages?pretty&limit=1"
{
   "error": 603,
   "message": "The requested URL was not found on this server"
}

experimental_features = true

$ curl -u foo:bar -k -X GET "http://127.0.0.1:55000/experimental/syscollector/os?pretty"
{
   "error": 0,
   "data": {
      "totalItems": 1,
      "items": [
         {
            "sysname": "Linux",
            "scan_id": 1304709233,
            "os_name": "CentOS Linux",
            "scan_time": "2018/06/29 16:28:25",
            "hostname": "manager",
            "os_version": "7 (Core)",
            "version": "#1 SMP Wed Mar 7 19:03:37 UTC 2018",
            "architecture": "x86_64",
            "release": "3.10.0-693.21.1.el7.x86_64",
            "agent_id": "000"
         }
      ]
   }
}

Regards,
Javi.