Show node details on error
Fixing review comments
Fixing doto usage in creating ErrorInfo
Fixing testing issues.
Remove unwanted moving js lines
Add testing best practices to DEVELOPER.md
Merge branch 'node-details-on-error' of https://github.com/kishorvpatil/incubator-storm into STORM-360

STORM-360: Add node details for Error Topology and Component pages
Added STORM-360 to CHANGELOG