fix(Enterprise Billing Units): re-gen service with latest API

Author: padamstx

ibm_platform_services/enterprise_billing_units_v1.py

@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# IBM OpenAPI SDK Code Generator Version: 99-SNAPSHOT-c13a8e62-20201201-164100
+# IBM OpenAPI SDK Code Generator Version: 99-SNAPSHOT-629bbb97-20201207-171303
 
 """
 Billing units for IBM Cloud enterprises