Murano CLI tests

Need to check that murano cli commands work, in connection with common use practices it would be implemented like this https://github.com/openstack/tempest/blob/master/tempest/cli.
Planned to make directory 'cli' in https://github.com/stackforge/murano/tree/master/functionaltests and place new tests there. This this test suite will be launched on devstack gate.
A list of simple tests which planning to add:
    *Environments list check(murano environment-list)
    *Packages list check(murano packages-list)
    *Category list check(murano category-list)
A list of advanced tests which planning to add:
    *Environment create check(murano environment-create)
    *Environment delete check(murano environment-delete)
    *Environment show check(murano environment-show)
    *Environment rename check(murano environment-rename)
    *Environment deploys show(murano deployment-list)
    *Package deletion check(murano package-delete)
    *Package download check(murano package-download)
    *Package import check(murano package-import)
    *Package list check(murano package-list)
    *Package show check(murano package-show)