Checkpoint: Get all nodes works
Added: Node store service
Added: Node store views
Added: Node store unit tests
Added: NodeStoreService to guice store module
Added: Tests for get node
Added: Tests for delete node
Added: Function to write multiple nodes.
Removed: new node code from cluster store
Added: Node exists in node store
Added: Node set and insert to node store
Added: Tests for deleting node as user and admin
Added: Tests for testing update node in store