vtk_common: Add VTK_USE_LARGE_DATA option

Set this option in the initial CMakeCache.txt for VTK dashboard builds.
Default to OFF but allow local dashboard scripts to enable it to run
tests that use "large" data.

vtk_common.cmake

@@ -43,6 +43,7 @@
 #   CTEST_TEST_ARGS           = ctest_test args (ex: PARALLEL_LEVEL 4)
 #   CMAKE_MAKE_PROGRAM        = Path to "make" tool to use
 #   VTK_DATA_ROOT             = Where to put data tree
+#   VTK_USE_LARGE_DATA        = True to enable tests using "large" data
 #
 # Options to configure builds from experimental git repository:
 #   dashboard_git_url      = Custom git clone url
@@ -214,6 +215,10 @@ if(NOT DEFINED VTK_DATA_ROOT)
   endif()
 endif()
 
+if(NOT DEFINED VTK_USE_LARGE_DATA)
+  set(VTK_USE_LARGE_DATA OFF)
+endif()
+
 # Delete source tree if it is incompatible with current VCS.
 if(EXISTS ${CTEST_SOURCE_DIRECTORY})
   if(CTEST_GIT_COMMAND)
@@ -359,6 +364,7 @@ CTEST_USE_LAUNCHERS:BOOL=${CTEST_USE_LAUNCHERS}
 DART_TESTING_TIMEOUT:STRING=${CTEST_TEST_TIMEOUT}
 ExternalData_OBJECT_STORES:STRING=${ExternalData_OBJECT_STORES}
 VTK_DATA_ROOT:PATH=${VTK_DATA_ROOT}
+VTK_USE_LARGE_DATA:BOOL=${VTK_USE_LARGE_DATA}
 ${cache_build_type}
 ${cache_make_program}
 ${dashboard_cache}