Krishnan Parthasarathi 3032f0f505 Remove duration field from lock instrumentation (#4111)
Duration for which a lock was held can be computed from the `Since`
field of `OpsLockState`. It is the difference between current time and
time at which the namespace lock was held. This change avoids
superfluous instrumentation.
2017-04-15 11:40:01 -07:00
..
2017-02-10 11:51:41 -08:00