1. support mypy check, tox -e mypy or tox -e pep8 2. fix error of mypy check Change-Id: I41b0013d271f3c7d3a28e1ea6dd0b083893d8983
1. move skyline_apiserver out of libs 2. remove libs folder 3. remove old skyline folder 4. adjust zull, devstack and dockerfile Change-Id: I27a4babd3df077d1dfc7555f67a6ea618d4b2966