support Directory Reference

Files
	cmake_build_keywords.py
	uaclient_keywords.py
	uaexplorer_keywords.py
	uaitestserver_keywords.py
	ualib_auth_keywords.py
	uaplot_keywords.py
	uashell_keywords.py
	uastresstest_keywords.py
	uasubscription_keywords.py
	uawatch_keywords.py