Set use_xfs_quota=0|1 as needed at install time

Version 1.53


By default CentOS 7 DA binaries have use_xfs_quota=1 set internally. This check, done in the on CentOS boxes script will now check if the current quota_partition (/ or /home) has xfs enabled, and if it does, and doesn't match the internal default will change the data/templates/directadmin.conf so it uses the correct quota format right at install time.
