fix(package): set rpm user and group to create files with correct owner

[affo]

This PR makes rpm create files and directories with the right owner (user and group).
This makes it possible to avoid changing ownership after install and so breaking verification (rpm -V ...).

Required for all non-trivial PRs

• Rebased/mergable
• Tests pass
• CHANGELOG.md updated
• Sign CLA (if not already signed)

Required only if applicable

You can erase any checkboxes below this note if they are not applicable to your Pull Request.

• TICKscript Spec updated

[affo]

@nathanielc That option actually makes rpm create every file with that ownership, so, for example:

$ ls -al /usr/bin/kapacitor
-rwxr-xr-x 1 kapacitor kapacitor 8215494 Apr  4 09:56 /usr/bin/kapacitor

I can set finer grained permissions by using

--rpm-attr 750,kapacitor,kapacitor:/var/lib/kapacitor
--rpm-attr 750,kapacitor,kapacitor:/var/log/kapacitor

And change only lib and log dirs as it was done in post-install.sh.
Once this PR passes, I can apply the same logic to every other packaged project, because this bug affects them.

Tested on CentOS 7.

[affo]

I also realised, that no post install script is run when dpkg -i ... on Ubuntu.
Is this the expected behavior?

[nathanielc]

@affo Let's use the finer grained permissions.

[affo]

Tested on CentOS:

Installed:
  kapacitor.x86_64 0:1.5.3~rc0~6d9228f-0                                                                                                           

Complete!
[root@ddd77b7d6e55 /]# rpm -V kapacitor
[root@ddd77b7d6e55 /]# ls -al /var/lib/
total 60
drwxr-xr-x 1 root       root       4096 Apr  8 16:26 .
drwxr-xr-x 1 root       root       4096 Mar  5 17:34 ..
drwxr-xr-x 2 root       root       4096 Mar  5 17:35 alternatives
drwxr-xr-x 2 chronograf chronograf 4096 Mar 20 22:55 chronograf
drwxr-xr-x 2 root       root       4096 Nov  2 16:19 dbus
drwxr-xr-x 2 root       root       4096 Apr 11  2018 games
drwxr-xr-x 5 influxdb   influxdb   4096 Apr  3 07:13 influxdb
drwxr-xr-x 2 root       root       4096 Nov  2 17:40 initramfs
drwxr-xr-x 2 kapacitor  kapacitor  4096 Apr  8 16:24 kapacitor
drwx------ 2 root       root       4096 Mar  5 17:35 machines
drwxr-xr-x 2 root       root       4096 Apr 11  2018 misc
drwxr-xr-x 1 root       root       4096 Mar  5 17:36 rpm
drwxr-xr-x 2 root       root       4096 Apr 11  2018 rpm-state
drwxr-xr-x 4 root       root       4096 Mar  5 17:35 systemd
drwxr-xr-x 1 root       root       4096 Apr  8 16:26 yum
[root@ddd77b7d6e55 /]# rpm -qlv kapacitor
drwxr-xr-x    2 root    root                        0 Apr  8 16:24 /etc/kapacitor
-rw-r--r--    1 root    root                    24022 Apr  8 16:24 /etc/kapacitor/kapacitor.conf
-rw-r--r--    1 root    root                      151 Apr  8 16:24 /etc/logrotate.d/kapacitor
-rwxr-xr-x    1 root    root                  8215494 Apr  8 16:24 /usr/bin/kapacitor
-rwxr-xr-x    1 root    root                 78130638 Apr  8 16:24 /usr/bin/kapacitord
-rwxr-xr-x    1 root    root                  4560489 Apr  8 16:24 /usr/bin/tickfmt
drwxr-xr-x    2 root    root                        0 Apr  8 16:24 /usr/lib/kapacitor
drwxr-xr-x    2 root    root                        0 Apr  8 16:24 /usr/lib/kapacitor/scripts
-rwxr-xr-x    1 root    root                     5609 Apr  8 16:24 /usr/lib/kapacitor/scripts/init.sh
-rw-r--r--    1 root    root                      447 Apr  8 16:24 /usr/lib/kapacitor/scripts/kapacitor.service
-rw-r--r--    1 root    root                     9006 Apr  8 16:24 /usr/share/bash-completion/completions/kapacitor
drwxr-xr-x    2 kapacitokapacito                    0 Apr  8 16:24 /var/lib/kapacitor
drwxr-xr-x    2 kapacitokapacito                    0 Apr  8 16:24 /var/log/kapacitor

Also tested the deb package, and ownership looks correct:

root@bb3310ca8459:/# ls -al /var/lib/
total 32
drwxr-xr-x 1 root      root      4096 Apr  8 16:26 .
drwxr-xr-x 1 root      root      4096 Mar  7 21:01 ..
drwxr-xr-x 1 root      root      4096 Mar  7 21:01 apt
drwxr-xr-x 1 root      root      4096 Apr  8 16:26 dpkg
drwxr-xr-x 2 kapacitor kapacitor 4096 Apr  8 16:24 kapacitor
drwxr-xr-x 2 root      root      4096 Apr 24  2018 misc
drwxr-xr-x 2 root      root      4096 Mar  7 21:01 pam
drwxr-xr-x 3 root      root      4096 Mar  7 21:00 systemd

[affo]

moved lines here to preserve previous behavior in non REHL distros.

[nathanielc]

LGTM, Can you add an entry to the CHANGELOG for the fix?

[affo]

@nathanielc done