Refs #2392. Using reader manager to verify which  reader we need to use and so call the right one.

Change-Id: Id877c61330c5d6dcfbc5890b8e037090cb610829
(cherry picked from commit 0799537c45b82ae6de0ccdd9824915e05e2a1b6e)
Refs #2392. Added requests from reviewer. Remove load table command since this is now available through import table command.

Change-Id: Ic36e12f077af9217e3633bbd6c43ee26d19539bb
(cherry picked from commit ca1f0f4f0902ee6ffa188f0d9ac6ce3e53bb776e)