DRILL-7196: Queries are still runnable on disabled plugins
- Storage client is not created anymore for disabled plugins
- GET "/storage/{name}.json" endpoint now working with
plugin configuration directly, without client instantination.
It have increased UI responsitivity.
- Hbase and mongo base test classes refactored to honor enabled
plugin attribute
- Fixed path contructor for mongo test datasets:
Now it is cross-platform
- Fixed test json files format which using plugin definitions
- Code cleanup
