Fixes #999 - template:list throws UnexpectedValueException
[#832]: Disables old-style validations

The old-style validations were causing fatal errors in some situations. And because
a rewrite of all validators to the new validation framework is necessary and planned for
2.1 have I disabled the old style validations so that fatal errors occur no more.
Update changelog
Fixes #1016 skip non-interface descriptors
Merge branch 'develop' into release-2.0.2

Conflicts:
	CHANGELOG.md
Merge branch 'develop'