python2.pkgs.google-auth-httplib2: disable tests

	============================= test session starts ==============================
	platform linux2 -- Python 2.7.17, pytest-4.6.6, py-1.8.0, pluggy-0.13.0
	rootdir: /build/google-auth-httplib2-0.0.3
	plugins: localserver-0.5.0
	collected 0 items / 1 errors

	==================================== ERRORS ====================================
	_____________ ERROR collecting tests/test_google_auth_httplib2.py ______________
	ImportError while importing test module '/build/google-auth-httplib2-0.0.3/tests/test_google_auth_httplib2.py'.
	Hint: make sure your test modules/packages have valid Python names.
	Traceback:
	tests/test_google_auth_httplib2.py:20: in <module>
	    import google_auth_httplib2
	google_auth_httplib2.py:21: in <module>
	    from google.auth import exceptions
	E   ImportError: No module named google.auth