Handle copying ranger-ugsync-default.xml for RU

issue:
While doing RU from HDP-2.2 to HDP-2.3 ranger-ugsync-default.xml should get copied rather than setting the file permission without checking if file exist or not.
It needs to be copied from conf.dist to conf directory of ranger-usersync.

Workaround

User needs to copy ranger-ugsync-default.xml from conf-dist to conf folder :

su -l ranger
cp <path_to_usersync_home>/conf.dist/ranger-ugsync-default.xml  <path_to_usersync_home>/conf/ranger-ugsync-default.xml