dtc unit tests

[mtarking]

Name                                                     Stmts   Miss  Cover
----------------------------------------------------------------------------
plugins/action/dtc/add_device_check.py                      22      0   100%
plugins/action/dtc/diff_model_changes.py                    36      0   100%
plugins/action/dtc/existing_links_check.py                  32      0   100%
plugins/action/dtc/fabric_check_sync.py                     18      0   100%
plugins/action/dtc/fabrics_config_save.py                   22      0   100%
plugins/action/dtc/fabrics_deploy.py                        22      0   100%
plugins/action/dtc/get_poap_data.py                        110      0   100%
plugins/action/dtc/links_filter_and_remove.py               31      0   100%
plugins/action/dtc/manage_child_fabric_networks.py          82      0   100%
plugins/action/dtc/manage_child_fabric_vrfs.py              80      0   100%
plugins/action/dtc/manage_child_fabrics.py                  34      0   100%
plugins/action/dtc/map_msd_inventory.py                     38      0   100%
plugins/action/dtc/prepare_msite_child_fabrics_data.py      31      0   100%
plugins/action/dtc/prepare_msite_data.py                    68      0   100%
plugins/action/dtc/unmanaged_child_fabric_networks.py       36      0   100%
plugins/action/dtc/unmanaged_child_fabric_vrfs.py           36      0   100%
plugins/action/dtc/unmanaged_edge_connections.py            34      0   100%
plugins/action/dtc/unmanaged_policy.py                      39      0   100%
plugins/action/dtc/update_switch_hostname_policy.py         26      0   100%
plugins/action/dtc/verify_tags.py                           19      0   100%
plugins/action/dtc/vpc_pair_check.py                        20      0   100%
----------------------------------------------------------------------------
TOTAL                                                      836      0   100%