Add test file for q_in_q vport.
Fix bsn_vport subtype, add l2gre vport and test file.

Conflicts:

	c_gen/build_of_g.py
	c_gen/c_code_gen.py
	c_gen/c_test_gen.py
	c_gen/templates/loci_show.h
	java_gen/java_type.py
remove q_in_q and l2gre entries in c_gen/type_maps.py.
Add flags to bsn_vport_l2gre.
Add java test for bsn_vport_l2gre and bsn_vport_q_in_q.