Merge pull request #2159 from diogofscmariano/BACKLOG-1562

[BACKLOG-1562] - Added default acl node location. Tests updated
[BACKLOG-1562] Add support for ACL shadow nodes in repository - fix the NPE
[BACKLOG-1562] Add support for ACL shadow nodes in repository - re-implement the Helper to avoid calling runAsSystem
Merge pull request #2167 from akhayrutdinov/ds-provision

Ds provision
[BACKLOG-1562] Add support for ACL shadow nodes in repository - bug fix and a corresponding test
Merge pull request #2169 from akhayrutdinov/ds-provision

[BACKLOG-1562] Add support for ACL shadow nodes in repository - bug fix ...