fix missing parameter in docstring

Change-Id: I6ac69dec113897216adf09c63928f56564f2a6fc

vitrageclient/v1/alarm.py

@@ -20,6 +20,7 @@ class Alarm(object):
     def list(self, vitrage_id, all_tenants=False):
         """Get a all alarms on entity
 
+        :param all_tenants: should return all tenants alarms
         :param vitrage_id: the id for the entity
         """
         params = dict(vitrage_id=vitrage_id,

vitrageclient/v1/rca.py

@@ -20,6 +20,7 @@ class Rca(object):
     def get(self, alarm_id, all_tenants=False):
         """Get RCA for an alarm
 
+        :param all_tenants: should return all tenants rca
         :param alarm_id: the id of the alarm
         """
         params = dict(alarm_id=alarm_id,

vitrageclient/v1/resource.py

@@ -20,6 +20,7 @@ class Resource(object):
     def list(self, resource_type=None, all_tenants=False):
         """Get a all resources
 
+        :param all_tenants: should return all tenants resources
         :param resource_type: the type for the resources
         """
         params = dict(resource_type=resource_type,