environment role deletion method should also return a bool

atst/domain/environment_roles.py

@@ -21,3 +21,6 @@ class EnvironmentRoles(object):
         if existing_env_role:
             db.session.delete(existing_env_role)
             db.session.commit()
+            return True
+        else:
+            return False

atst/domain/environments.py

@@ -72,8 +72,11 @@ class Environments(object):
             environment = Environments.get(id_and_role["id"])
 
             if new_role is None:
-                EnvironmentRoles.delete(workspace_role.user.id, environment.id)
-                updated = True
+                role_deleted = EnvironmentRoles.delete(
+                    workspace_role.user.id, environment.id
+                )
+                if role_deleted:
+                    updated = True
             else:
                 env_role = EnvironmentRoles.get(
                     workspace_role.user.id, id_and_role["id"]