Update VisItBridge to fix timstep issue with Nek5000 file series.

When opening a Nek5000 fileseries, only the 1st timestep had correct time
values, all the others were 0. This patch fixes that issue based on the code in
VisItBridge 2.6.3. Basically, we needed to iterate over the files during
initialization to determine the vailable timesteps.

Change-Id: I45a30daa5e5de71189c6393a16f68283f99746d9
Merge topic 'nex5000-timesteps' into next

071f07f Update VisItBridge to fix timstep issue with Nek5000 file series.
Add small fix to WebVisualizer

Change-Id: Ibcae8b635ca5964d525ab556d84f0e13ac3c3227
Merge topic 'pvweb-update-file-loader-app' into next

68a8ab9 Add small fix to WebVisualizer
Changed names of testing module functions to python style.

Change-Id: I8c85ae46e1736c6a2465a2c25bfb327fe08a3bc2
Merge topic 'paraview-web-client-tests' into next

0e20022 Changed names of testing module functions to python style.