upgrade_tests/upgrade_manifest.py (5 lines):
	- line 21: # TODO add a new item whenever Cassandra is branched and update TRUNK to the version present in trunk
	- line 92: # TODO add a new item whenever Cassandra is branched
	- line 157: # TODO define new versions whenever Cassandra is branched
	- line 181: # TODO – add current_5_1_x when this gets uncommented (when 5.1-alpha1 is released)
	- line 192: # TODO define new upgrade scenarios whenever Cassandra is branched