Separate CSV export into its own bundle #161

Fix issue #161:
Separate CSV export into its own bundle. (Previously it was in scenario.)

Additionally, add CSVExportCapability interface by which components can override and/or customize CSV output. When this capability is absent, action should perform as it does currently (essentially assembling a whole lot of columns based on metadata as it would appear in the info view)

Modified the following files:
ScenarioPluginProvider 

Wrote or re-wrote unit tests (Y/N): N
Ran entire suite of unit tests successfully (Y/N): Y
Verified bug fix with the described replication steps or verified the implementation meets the requirement cited (Y/N): Y
Code coverage requirements satisfied (new code=80%, changed code=at least as high as existing) (Y/N): N
Code review date and attendees: Code review by pull request
Describe potential impact on other areas of the code: startup
Describe any test prerequisites for this fix (e.g., restart the database): N
For bugs marked "Regression - Yes", describe the cause of the regression:
Did you modify any pom.xml file? If yes, did you thoroughly document your changes and reasons? Y