MAGN-5147: Change sandbox default ASM version to 219

This PR changes the default LibG / ASM load order to be synced with LibG master. If both Revit 2014 and Revit2015 are installed, Dynamo Sandbox will default to Revit2014's DLLs (ASM 219).

It makes my life easier, as documented in http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-5147

@ikeough PTAL