tests: Use Python unittest module parameterization for annotationparser

Add Python unittest module parameterization support to gi-tester through the
use of a "TESTARGS" variable. Use the Automake test harness along with
gi-tester for running the Python annotationparser tests.
Add tests/scanner/annotationparser/Makefile.am and localize testing
rules and EXTRA_DIST setup to this file. Specific Python tests can now be
run as follows:

cd tests/scanner/annotationparser
make check TESTS=test_patterns.py TESTARGS=TestTagValueStability

https://bugzilla.gnome.org/show_bug.cgi?id=720713