implement a Graph visitor: GraphTimeStampUpdater

Summary: This one update the state of every Node/Rule based on their timestamp

Test Plan:
build the graph and compile the project (will show/build only the
 needed rules)

Reviewers: adrienconrath

Reviewed By: adrienconrath

Subscribers: NicolasDP

Maniphest Tasks: T8

Differential Revision: http://91.121.199.76/D26