The following sniffs are failing and were disabled:
* MediaWiki.Commenting.FunctionComment.MissingDocumentationPrivate
* MediaWiki.Usage.PHPUnitDeprecatedMethods.AssertInternalTypeGeneric

Additional changes:
* Also sorted "composer fix" command to run phpcbf last.

Change-Id: Id852cd740a6898e0bd671aa1b11a6dfdf9baa246