OAV Validation

During the PUT request if the properties are marked for CREATE and READ only, it is not validating if the user has changed the properties which are marked for CREATE and READ only. It allows the end user to change any property.

Also, if the string property is marked as Required, it is accepting empty as valid value, which I believe should not be the case.

No files or tests are named. Start by locating the PUT request validation entry point and the checks for CREATE/READ-only properties and required strings; done means changed protected properties and empty required strings are rejected, with regression coverage for both cases.

Written by the indexing model from the issue text.