MB-100: Manifests/toy-couchstore

- Fixes for setting the right taskID
- IOManager integrated with KVSHard

Change-Id: I8361226b81aae029255ef113ef300fa0a2863875
Reviewed-on: http://review.couchbase.org/25956
Reviewed-by: abhinav dangeti <abhinav.dangeti@gmail.com>
Tested-by: abhinav dangeti <abhinav.dangeti@gmail.com>