Fix MAGN-2213 Crash while placing custom node downloaded from Package Manager
Merge pull request #1286 from Benglin/MAGN-2213

Merging this in due to its urgent nature (testing impact).
Add mapping between callsite and graph UI node
Test cleanup

- Fixed few NUNIT failures due to missing math.dll, replaced the call to
use DSCoreNodes.dll which implements Math class
- The validation for few node migration tests have been updated.
Merge pull request #1287 from sharadkjaiswal/DataMarshaling

Test cleanup
Merge branch 'ChocoButter-2Become1' into node_mapping
Fix gitignore and re-track ASM folder.
Update ASM ignore.
Fix regressions
Rename LiveRunner.GetAstNodes() to LiveRunner.GetSSANodes()
Merge pull request #1288 from ke-yu/node_mapping

Node mapping between callsite and graph UI node