CLOUDIFY-2341 plugins decorators initial commit
implemented with_node_state decorator.
added node state arg name to with_node_state decorator.
Merge branch 'develop' into feature/CLOUDIFY-2341-plugin-decorators
implemented with_node_state and with_logger decorators.
flake8
simplified decorators injection
remove unused argument from inject_argument method.
Merge pull request #6 from CloudifySource/feature/CLOUDIFY-2341-plugin-decorators

CLOUDIFY-2341-plugin-decorator