Added Failure category to the tests those are failing on latest build.

This is part of fixing defect (MAGN-4178) for Test Cleanup.
return lowercase string for boolean value
return lower case string for boolean value in watch and preview window
Remove comment
watch node now properly displays list indexes
mirrored changes to revitwatchhandler
MAGN-322: bug with circles created with zero normal vector
Merge pull request #2257 from Steell/watchnode-list0-indexing

Watch Node now displays list indices: MAGN-4347
MAGN-2635: Rename CoordinateSystem and Geometry Reflect to Mirror
Merge branch 'master' of github.com:DynamoDS/Dynamo
Cleanup unused using statements.

Conflicts:
	src/DynamoCore/Models/HomeWorkspaceModel.cs
Do not run the expression when shutting down.

Conflicts:
	src/DynamoCore/Models/DynamoModel.cs
	src/DynamoCore/Models/HomeWorkspaceModel.cs
Remove a debug print.
Remove a debug print.
Remove one more debug print.
Add null checks.

Avoid attempting to load trace data if the engine controller is null.
Added missing comments to CoordinateSystem, added search tag to Mirror
Merge branch 'master' of github.com:DynamoDS/Dynamo
Merge pull request #2237 from riteshchandawar/AddFailureCategory

Added Failure category to the tests those are failing on latest build.
Merge pull request #2240 from ke-yu/fix_default_booleanvalue

When bool value is converted to string, string should be lowercase