CppTools: Remove test file after test

In test_includeGroups_detectIncludeGroupsByIncludeType the test file was
not removed and thus subsequent and isolated executions of this test
failed.

Change-Id: I5eeb4f004f5b146ac794ca913b4092629131fca3
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
QmlDesigner.Model: Treating Tab as Component

Any property called "component" which is a ModelNode::NodeWithComponentSource
can be treated as a component.

Change-Id: I6a36d1f204575f2ec7c9e29186f2bca14c526793
Reviewed-by: Marco Bubke <marco.bubke@digia.com>