Add missing contants
Missing constants MIN_VLAN_TAG and MAX_VLAN_TAG in function
is_valid_vlan_tag, path: tacker/common/utils
# TODO(salv-orlando): Verify if a single set of operational
# status constants is achievable
+MAX_VLAN_TAG = 4094
+MIN_VLAN_TAG = 1
+
PAGINATION_INFINITE = 'infinite'
SORT_DIRECTION_ASC = 'asc'
