Fix incorrect strings and formatting

There were a few typos and some lines of code that weren't formatted
properly. Now, the typos are fixed and the misformatted code is
corrected.

Change-Id: I6009e44f65b9be1ae9edc806618342c334b2fa92

watcher/common/utils.py

@@ -165,7 +165,7 @@ def extend_with_strict_schema(validator_class):
                 raise exception.AuditParameterNotAllowed(parameter=para)
 
             for error in validate_properties(
-                    validator, properties, instance, schema
+                validator, properties, instance, schema
             ):
                 yield error