ARGUS-186: Updated usersync service for better handling of failures in
sending users/groups to policy admin.
ARGUS-187 trim whitespace(s) around = sign and after the property value in install.properties

Signed-off-by: Madhan Neethiraj <madhan@apache.org>
Ranger-191:Credential Provider and Policy Cache Store Unit Test Case
coverage
Argus-191: Adding missing License header
RANGER-181: moving Ranger Site (ranger.incubator.apache.org) document into ranger repo
Modified twitter account to Ranger4Hadoop
BUG-26864 Exclude test artifacts from admin-war