===============
- added enable/disable consistency feature to modify_storage_group_srdf
function in replication
- Updated add_existing_volume_to_storage_group to create RDF pairings.
- made srdfg number mandatory in delete_storage_group_srdf, added filters
options, removed unit test test_delete_storagegroup_srdf_no_number
- updated constants file ISCSI_IQN_SEARCH_PATTERN = (
'^iqn.\\d{1,4}-\\d{2}.(?:com|org).\\w{1,}:(?:\\d{2}:)*'
'[0-9a-fA-F]{1,32}$||.[0-9A-Fa-f]{16}')
added test to ci_utils.py test_iscsi_regex
- added relink to modify_storage_group_snapshot and
modify_storage_group_snapshot_snapsetid