Adds metrics for transactions received, completed,
and transaction duration.

FAB-12797 #done

Change-Id: I4bd48ed57e37e2be8ac95319a996889d61fa09e2
Signed-off-by: Will Lahti <wtlahti@us.ibm.com>
Signed-off-by: Matthew Sykes <sykesmat@us.ibm.com>