Fixes #6875 - OpenAPI Schema inconsistent operationId casing

[peterfarrell]

Description

Fixes incorrect casing of operationId in OpenAPI generation - refs #6875. Specifically fixing ListThings to listThings which standardizes on lowerInitialCamelCase like the other method types.

Updated tests as well.

[peterfarrell]

@carltongibson Fixed issue with casing also fixed edge cases where it incorrectly removed the "action" from the end of the name. If the view class was called AuthorRecreate, it would incorrectly build the operationId as createAuthorRe by stripping create was the action at the end when it's the end steam of Recreate. Used title() on the action to properly look at the camel-casing of the name to see if the action should be stripped from the end AuthorRecreate (put) -> createAuthorRecreate.

Ready for review.

[carltongibson]

OK, super. Thanks @peterfarrell!