RFR: 7039: Timestamp granularity too coarse [v3]

[Suchita Chaturvedi]

> As part of this enhancement request, user can see the timestamps down to fraction of a second.
> This will solve the problem for all views, including Event Browser, Properties where most of the records are differentiated by fraction of seconds but since the timestamp shown is only till second, the difference is not visible on UI.
> 
> For ex: If the End Time of Event is listed as below, the difference is clearly visible
> ![image](https://user-images.githubusercontent.com/11155712/105097851-465a8680-5acf-11eb-8a5c-f01ecb3390ce.png)

Suchita Chaturvedi has updated the pull request incrementally with one additional commit since the last revision:

  Fixed test failures due to change in timestamp format

-------------

Changes:
  - all: https://git.openjdk.java.net/jmc/pull/201/files
  - new: https://git.openjdk.java.net/jmc/pull/201/files/808b9f82..6fb15c97

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=201&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=201&range=01-02

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jmc/pull/201.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/201/head:pull/201

PR: https://git.openjdk.java.net/jmc/pull/201