CLOUDSTACK-6392: system template always create with name master instead of specific branch

Signed-off-by: Abhinandan Prateek <aprateek@apache.org>
Disabling the failed test cases mentioned in the following tickets integration.smoke.test_iso - CLOUDSTACK-6769, CLOUDSTACK-6774

Signed-off-by: Abhinandan Prateek <aprateek@apache.org>