Implement CheckDataModelPolicyEnumeratedTypeSpec

[johncross]

Use DataModelPage, DataModelPolicyListPage.

Note: this policy is not in all of my databases, so don't be surprised if it fails first time. I need to check when it was introduced.

[vijayshukla30]

@johncross
The regular expression /."key"\s:\s*(?!"[a-z0-9]+").*/ given don't match so I removed * from the regular expression. Then new regex is /."key"\s*:\s*(?!"[a-z0-9]+")./