Run restorecon against actual rabbitmq directories

restorecon does not work with symlinks. We need to find the
actual path of the directories before running it.  This can
be done with readlink -f on the symlinks.

Change-Id: Ibce2bc4eeb087b7d0ecd64fc5608abcbf51357a3
Closes-Bug: 1396415
Merge "Run restorecon against actual rabbitmq directories"