* Reverted changes for REPO-3743 #276
* Changes in PersonService to ensure a consistent behaviour for the System case:
- PersonService.createPerson() throws now an AlfrescoRuntimeException when trying to create a person for the username 'System'
- PersonService.getPerson("System") throws NoSuchPersonException
- PersonService.personExists("System") returns false
* Remove StandardRenditionLocationResolverTest tests from the suite - the RenditionService deprecated, so related tests won't be maintained
* Fixes for the System user case in ImapService
* Update alfresco-data-model 8.27
* REPO-2793: refactoring the tests in the test suites so we can get more efficient and balanced Test Suites
* REPO-2793: cleanup and renames
* REPO-2793: fix the Virtual Folder tests that was failing on bamboo
* REPO-2793: fix some rendition tests on the build by running them earlier
* REPO-2793: fix the test testAR1303. It needed some cleanup