bitbake: tests/parse: Add very basic start of parse tests

This tests very basic usage of the parser and then adds a test
to ensure that incomplete functions raise an exception.

(Bitbake rev: b7bcef141b56fe8eb03724ea5251e3251fc63817)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/bin/bitbake-selftest

@@ -39,6 +39,7 @@ else:
              "bb.tests.cow",
              "bb.tests.data",
              "bb.tests.fetch",
+             "bb.tests.parse",
              "bb.tests.utils"]
 
 for t in tests: