Update all RevitNodesTests for new base class.
Fix all VisualizationManager tests but two.

The base class for these tests was not initializing the geometry
library. Adding the preloader fixed this.
Merge pull request #2860 from vmoyseenko/DUI-RemoveUnusualGroups

Remove unusual groups
Merge pull request #2876 from Randy-Ma/level

Adjust the level name if there is an existing level with the same name
Merge pull request #2852 from Randy-Ma/unit_test

Add a test case for element binding when an exception is thrown
Added a new skeleton class "QueryMirrorDataAsyncTask"
Merge branch 'master' of https://github.com/DynamoDS/Dynamo
Fixed Test Case 3166 by updating xml.

Some how there was one extra port was getting added to List.Join node which was causing test failure. Not sure how come this was passing earlier.
Bump the version number on Master to 0.7.4

Daily builds are going to run ahead of release build because it has more
than what's there in release branch. Hence RC branch will have version
0.7.3 whereas daily builds will have version 0.7.4
Merge pull request #2900 from riteshchandawar/FixFor3166

Fixed Test Case 3166 by updating xml.
Rename view load/unload event handler name in dynNoteView
Rename event handlers
Move one utility function to RevitServices
Rename event handlers
addressed review comments
Merge pull request #2902 from Conceptual-Design/master

version number changed to 0.7.4
Merge pull request #2872 from theanh0512/MAGN5043

FIxed MAGN5043 and MAGN3842
Fix regression
Minor update
Merge pull request #2884 from aparajit-pratap/fixCompletionTests_Part2

Updated code block UI and unit tests to use CodeCompletionServices