TextNodeTest does not verify level 2 functionality supported

Even though the Search chaptor's text() section (6.6.4.12) never explicitly calls this function out as level 2, I still think it is from the description of jcr:xmltext under XML Mappings (section 6.4.2.3). Under this assumption, the LEVEL_2_SUPPORTED Repository descriptor should be verified true before running any of the TextNodeTest testcases, and should throw an NotExecutableException if not.

This TCK bug causes the following (4) testcases to fail:
TextNodeTest.testTextNodeTest()
TextNodeTest.testTextNodeTestMultiNodes()
TextNodeTest.testTextNodeTestContains()
TextNodeTest.testTextNodeTestWithPosition()