This update is to fix failures in unittests below.
* `custom_def` in Policy class was changed from str to dict in
tosca-parser. This arg isn't interested in the test, so it's replaced
with empty dict.
* Fix unsafe yaml loader with `yamf.safe_load`.
It also removes nouse pip packages which cause failures while
resovlving dependencies, and some tiny refactoring.
Signed-off-by: Yasufumi Ogawa <yasufum.o@gmail.com>
Change-Id: I8ae60a4ae9f139073f05ec0f99fa82c8bb24ee50
65dfa754e2