ENH: Added test for vtkImageCroppingRegionsWidget to improve coverage

Change-Id: Iea91c86c6a2f80b0222438bc64c847984d42ec9f
Cleaned up the Exodus metadata.

Removed a number of unused functions in Exodus metadata to
improve coverage.

Change-Id: I943d33799e9cbf45ad8a2e60826afde090b05308
Fixed minor typo - case sensitivity issue.

Change-Id: I4b481b2882a781fa4707805798baedee90961732
Removed verts from streaklines - lines are enough.

Change-Id: I141f107218cf5d851b1c4cd559a2786cbb554882
Removed unnecessary recursion in pipeline streaming.

When filters set CONTINUE_EXECUTING, the pipeline used recursion
to continue executing. I don't think that this was the original
intent. Fixed it with a 1 line change.

Change-Id: I98da463e3bde81fa10cde95a82827de357ff3f07
Filter was modifying self in request. Fixed.

Filters are not allowed to call functions that call their MTime
to update during any request passes. vtkParticleTracerBase was
calling a Set method that did that. Fixed.

Change-Id: I2381c8400eff3d6a081df796ca5726fc89d75a96
Fixed minor typo in documentation.

Change-Id: I4eb8017bd202c9952704f09ec9c94ad42d6e04ee
Merge topic 'cleanup-exodus-metadata' into master

0110b9d1 Fixed minor typo - case sensitivity issue.
2b1a0e32 Cleaned up the Exodus metadata.
Added test for vtkTableBasedClipDataSet.

Change-Id: I5be08f01e36842a8db3623ac1f2142dafc23fcdd
Merge topic 'test-table-based-clip' into master

ccb8acf6 Added test for vtkTableBasedClipDataSet.
Merge topic 'fixed-documentation-streakline' into master

e5f79532 Fixed minor typo in documentation.
Add a delay between process launches.

It so happens that the client process was launched before the server causing
deadlocks in some cases. Fixed that by adding a small delay. In reality, we may
need to logic to vtkTestDriver to make it more featured and parse outputs from
processes to handle this correctly. We can do that in next stage.

Change-Id: Ief6989c50e816bc8b6b7f8a780fd31b578079f4c
Merge topic 'filter-modified-in-request' into master

dca4464c Filter was modifying self in request. Fixed.
Merge topic 'remove-recursion-continue-executing' into master

9c95cee8 Removed unnecessary recursion in pipeline streaming.
Merge topic 'test_vtkImageCroppingRegionsWidget' into master

d90b36a8 ENH: Added test for vtkImageCroppingRegionsWidget to improve coverage
Merge topic 'fix_socket_test' into master

4c3786b0 Add a delay between process launches.
Merge topic 'remove-verts-from-streaklines' into master

d67d5dbc Removed verts from streaklines - lines are enough.