Fixes #6013, #6014, #6979 - changes for RHEL7

(cherry picked from commit 7a59c90304ef32a67457a8071bbda07d161b6236)
Fixes #7034 - added RHEL7 support to relabel script

(cherry picked from commit 7b9410507203c9c5f58283bc39f5da8ee8a92608)
Fixes #7036 - allow log files creation for Rails app

(cherry picked from commit e842477295ed731377f3f43c5b8f84634b6f47a2)
Release 1.6.0-RC1