Improve service validation during upgrade Heat

  * Added modules which allow to check services status.

Change-Id: Ifca2dab98dfba579b3118c1365caf9e818600bf5
Related-PROD: PROD-25156
diff --git a/_modules/heatv1/__init__.py b/_modules/heatv1/__init__.py
index 45c5cdb..91ecf60 100644
--- a/_modules/heatv1/__init__.py
+++ b/_modules/heatv1/__init__.py
@@ -13,15 +13,18 @@
 
 
 from heatv1 import stack
+from heatv1 import services
 
 stack_create = stack.stack_create
 stack_delete = stack.stack_delete
 stack_list = stack.stack_list
 stack_show = stack.stack_show
 stack_update = stack.stack_update
+service_list = services.service_list
+service_wait = services.wait_for_service
 
 __all__ = ('stack_create', 'stack_list', 'stack_delete', 'stack_show',
-           'stack_update')
+           'stack_update', 'service_wait', 'service_list')
 
 
 def __virtual__():