make dashboard scraper easier to use

Change-Id: Ic8c209e3570890f85b2d4e2203a685aaae374f25
ENH: Tcl tests should not fail if VTK_DATA_ROOT is missing.

A test should run without VTK_DATA_ROOT unless it needs input data
from VTK_DATA_ROOT. Tests that have image baselines should still run
unless they need input data.

rtImage.tcl is modified to skip baseline comparisons if VTK_DATA_ROOT
is not defined.

CMakeLists.txt files are converted to use add_test_tcl macro for
consistency.

CMakeLists.txt files are changed to isolate tests that need input
data.

This was tested as follows:
1) configured a build with VTK_DATA_ROOT undefine
   ctest -R Tcl-
   154 tests passed
2) configured a build with VTK_DATA_ROOT defined
   ctest -R Tcl-
   390 tests passed

This means that 390-154 = 236 tcl tests require input data

Change-Id: I9067a3e3e2a710ddf353f0181cc7b22a85b5ef10
add command line arg to choose date to scrape

Change-Id: Id868103a20b9edbeca146bc3e525df2f38928ab7
standardize cmake booleans

Change-Id: I6bdc4f443980fe4a324f3d042d8c92ab0c71f31f
submitter view header line off was off by one

Change-Id: I723d67fb3ded5ff1af31ab0882086e44320a0c25
Merge topic 'cdash_discover' into master

465cf5d4 submitter view header line off was off by one
fbee4f09 standardize cmake booleans
ba5a3de9 add command line arg to choose date to scrape
732de7e5 make dashboard scraper easier to use
COMP: Increase error tolerance for TestGL2PSExporterVolumeRaster

After changing from Debug to Release, the Continuous had a small
variation in the produced image.

Change-Id: I382882429008597d96ab8c5e82b65a2863c09671
Merge topic 'Tolerance_PNGCompare' into master

d5524e91 COMP: Increase error tolerance for TestGL2PSExporterVolumeRaster
Merge topic 'TestingWithoutData_Tcl' into master

c5ab6fda ENH: Tcl tests should not fail if VTK_DATA_ROOT is missing.
COMP: Increase tolerance for TestParametricFunctions

Adde TestParametricFunctions tcl test requires a tolerance.

Change-Id: I956dbec5c3b24a3eaeabc79dc598015254d001df
Merge topic 'Tolerance_TestParametricFunctions' into master

e6f9434f COMP: Increase tolerance for TestParametricFunctions