Speed up Git version info test by setting <Project>_TRACE_DEPENDENCY_…

…HANDLING_ONLY=ON (TriBITSPub#597)

This spead up these tests on my machine 'crf450' from about 3.4 sec to about
0.45 sec.

We don't need to enable the compilers and process the package CMakeLists.txt
files to test this version info.

test/core/ExamplesUnitTests/TribitsHelloWorld_Tests.cmake

@@ -66,6 +66,7 @@ tribits_add_advanced_test( TribitsHelloWorld_config_git_version_single_repo_one_
       -DTribitsHelloWorld_TRIBITS_DIR=${${PROJECT_NAME}_TRIBITS_DIR}
       -DTribitsHelloWorld_ENABLE_TESTS=ON
       -DTribitsHelloWorld_GENERATE_REPO_VERSION_FILE=ON
+      -DTribitsHelloWorld_TRACE_DEPENDENCY_HANDLING_ONLY=ON
       -DGIT_EXECUTABLE=${${PROJECT_NAME}_TRIBITS_DIR}/python_utils/mockprogram.py
       ../TribitsHelloWorld
     PASS_REGULAR_EXPRESSION_ALL
@@ -122,6 +123,7 @@ tribits_add_advanced_test( TribitsHelloWorld_config_git_version_single_repo_two_
       -DTribitsHelloWorld_TRIBITS_DIR=${${PROJECT_NAME}_TRIBITS_DIR}
       -DTribitsHelloWorld_ENABLE_TESTS=ON
       -DTribitsHelloWorld_GENERATE_REPO_VERSION_FILE=ON
+      -DTribitsHelloWorld_TRACE_DEPENDENCY_HANDLING_ONLY=ON
       -DTribitsHelloWorld_SHOW_GIT_COMMIT_PARENTS=ON
       -DGIT_EXECUTABLE=${${PROJECT_NAME}_TRIBITS_DIR}/python_utils/mockprogram.py
       ../TribitsHelloWorld