Add: Functionality to call session manager from bls.

Merged Akshay Bharambe requested to merge ab_Add_SessionMGRCache into devbranch
  1. Add: session manager store to v2. Users can access and manipulate sessions with provided APIs.
  2. Fix: Redis cache returns gjson.Result{} as a response to Get(). Changed it to string.
  3. Add: Detect cache type at runtime with Type().

Closes MKCLOS/coreosv3/corestudio#315

MKCLOS/coreosv3/corestudio#290

Edited by Akshay Bharambe

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