Merge upstream

Remove file doc comments.

Services 8.x-4.x additional enhancements

Revert "Issue #2759243 by rajeshwari10: Replace the entity manager with the entity type manager in the code base"

This reverts commit b26d7488.

Rajeshwari Variar authored Jul 01, 2016 and Kyle Browning committed Jul 01, 2016

Issue #2759243 by rajeshwari10: Replace the entity manager with the entity type manager in the code base

Issue 2625242 - getTree service definition

while reviewing the entity post plugin I noticed we did not have an access check which means access was always defaulting to TRUE. That is a pretty big security risk, so fixing.

Adding AliasGet plugin for retrieving an entity by it's path alias value

Testing access