[BISERVER-12093] - Cannot delete invalid Data Source - the check for mondrian schema file was deleted because we can't suppose that it is a valid xml file. Also was changed processing mondrian catalogs in method "loadCatalogsIntoCache".
BACKLOG-1178: Document File Management for the DI Server

There are jMeter tests for DI server: Document File Management, User Roles etc.
Merge pull request #2163 from MikhailGorbachev/BISERVER-12093

[BISERVER-12093] - Cannot delete invalid Data Source
Merge pull request #2161 from TatsianaKasiankova/BACKLOG-1178

BACKLOG-1178: Document File Management for the DI Server
Revert "[BACKLOG-872] Restructure Data Access to allow for deterministic build"
Revert "[BACKLOG-872] Fixes due to the introduction of the Property type in metadata."
Merge pull request #2170 from pentaho/revert-2168-master

Revert "[BACKLOG-872] Fixes due to the introduction of the Property type...
Merge pull request #2171 from pentaho/revert-2164-cleanup

Revert "[BACKLOG-872] Restructure Data Access to allow for deterministic...
BISERVER-12315 - XSS - Cross Site Scripting vulnerability in Rename Popup
Merge pull request #2162 from Aliaksandr-Kastenka/BISERVER-12315

BISERVER-12315 - XSS - Cross Site Scripting vulnerability in Rename Popu...