CLOUDIFY-2426 use simple send_reachable
CLOUDIFY-2426 modify test mock
CLOUDIFY-2426 integrate flake8 into project
CLOUDIFY-2426 move and rename send_reachable from notifications to set_node_started in manager
CLOUDIFY-2426 fix travis yaml
Merge pull request #2 from CloudifySource/feature/CLOUDIFY-2426-simplify-policies

Simplify policies