Include JMX Counters and resetTransactionCounters

added ReadFailedTransactionsCount
added AbortTransactionsCount
and
resetTransactionCounters

Note:
Could not get the details where InMemoryDatastore counters
are -- need to reset those counters as part of separate
commit

included copyright headers in files that didn't had

patch 4:
Review comments closed

patch 3:
removed a comment that is not needed.

Change-Id: I3b7b81bd6c28d2fb766947df8607e8c824445bb0
Signed-off-by: Basheeruddin Ahmed <syedbahm@cisco.com>
Merge "Include JMX Counters and resetTransactionCounters"