bdb native backup fixups

1. add message for native backup status
2. add bdb env config param: bdb.recovery.force.checkpoint
QuotaException causes delete failure

1) When QuotaException is thrown by delete, it fails the delete instead
of Quorum to decide the failure.
2) Added unit test to cover some part of the delete test case.
Releasing Voldemort 1.8.16

Releasing voldemort 1.8.16
ZoneShrinkage endToendTest fails

Zone is shrinked when the nodes receive get/put traffic.
The bootstrap URL is set to node 1 and node 0 is removed at the end
of zone shrinkage. Zone shrinkage metadata is written to nodes in order.
So first node 0 receives the update, that it is no longer part of the
cluster. But before node 1 is updated, the bootstrap code retries to
bootstrap from node 1. This is a race condition between admin client
setting correct metadata on all nodes and the client threads refreshing
the old value from other nodes. The problem is update metadataversion
properties fail as the node 0 is not longer a part of the cluster.

The race condition will be avoided if the bootstrap url and the node
in which we first write the metadata change are one and the same.
This is what this specific fix does, by making sure node 0 is not removed
during zone shrinkage.
2 zone configs
Adding comments to illustrate a problem

No code change.
Cleanup query keys output of Admin tool

1) Previously when the value bytes can't be deserialized it errored out
immediately and it does not print values of other nodes. You can do node
by node, but failed nodes can never be retrieved. Now if it fails, byte
array output will be printed.
2) When node does not have a key, it printed invalid metadata
exceptions for all other nodes. Now they are skipped in the output.
3) Does not report what all nodes had same value and which ones
differed.
add store-update command in new admin tool
Fixing the query-key in the new admin tool

I made the fix to the old tool incorrectly. Ported the code to the new
tool with no modification. Talked to Xu and merging this directly

Also added a minor fix to the unit tests which fails sometimes because
of error. Added some retries and ignoring the failure.
Releasing Voldemort 1.9.0