Collapse RequiredKeysDotDict and RequiredKeysLooselyTypedDotDict
Collapse RequiredKeysDotDict and RequiredKeysLooselyTypedDotDict

(cherry picked from commit 656ee212482f4d1ff656fb6f51d9eeac8a8e618e)

great-expectations/great_expectations,great-expectations/great_expectations,great-expectations/great_expectations,great-expectations/great_expectations