Merge branch 'develop' of https://github.com/allegro/ralph_pricing into develop
create base plugin classes and register decorator for plugin classes
plugin based on class fixed; power consumpion tests updated
service model and connected
services models improved
add scrooge sentry
fix flake8
remove needless comments
move url to setting
Merge branch 'develop' of https://github.com/allegro/ralph_pricing into develop
Merge branch 'develop' into feature/add-scrooge-sentry-logger

Conflicts:
	src/ralph_pricing/app.py
	src/ralph_pricing/management/commands/pricing_sync.py
merge with develop
fix tests
fix tests
fix requirement
manually install ralph
fix .trafis.yml
add unverified for ipaddr
fix install ralph in travis
add manually asset install