Snapshot changes

Fixed adjusted index logic.
Added tests
Added Reinstate Node in TestDriver.
Changes related to recovery from snapshot
Review changes
Rebased with latest

Tasks to be done:
1. Snapshot capture criteria
2. Handling Snapshot failure
3. Configuration Interface
4. Install snapshot

Change-Id: Ie0d8341f501fef87f48e8ea6f5d6b6e878d1abe3
Signed-off-by: Kamal Rameshan <kramesha@cisco.com>

Reinstate from snapshot + review changes

Change-Id: Ie0d8341f501fef87f48e8ea6f5d6b6e878d1abe3
Signed-off-by: Kamal Rameshan <kramesha@cisco.com>

TestDriver changes

Change-Id: Ie0d8341f501fef87f48e8ea6f5d6b6e878d1abe3
Signed-off-by: Kamal Rameshan <kramesha@cisco.com>

Log interpolation change

Change-Id: Ie0d8341f501fef87f48e8ea6f5d6b6e878d1abe3
Signed-off-by: Kamal Rameshan <kramesha@cisco.com>

Rebased.

Change-Id: Ie0d8341f501fef87f48e8ea6f5d6b6e878d1abe3
Signed-off-by: Kamal Rameshan <kramesha@cisco.com>
Merge "Snapshot changes"