Autogenerated update (2019-10-18)

Update:
- adexchangebuyer2_v2beta1
- cloudidentity_v1
- cloudidentity_v1beta1
- cloudshell_v1
- cloudshell_v1alpha1
- iam_v1
- lifesciences_v2beta

generated/google/apis/iam_v1/classes.rb

@@ -663,7 +663,7 @@ module Google
         attr_accessor :severity
       
         # The validation unit name, for instance
-        # “lintValidationUnits/ConditionComplexityCheck”.
+        # "lintValidationUnits/ConditionComplexityCheck".
         # Corresponds to the JSON property `validationUnitName`
         # @return [String]
         attr_accessor :validation_unit_name