* Added support for SSM get_parameters_by_path. Signed-off-by: Kai Xia <xiaket@gmail.com> * add logic to handle trailing '/'. Also, fix pep8. Signed-off-by: Kai Xia <kai.xia@sportsbet.com.au> * add tests for parameter value in response. Signed-off-by: Kai Xia <kai.xia@sportsbet.com.au>