Merge branch 'ctest_xml_tweaks' into release-3.15

Merge-request: !3423
diff --git a/Tests/RunCMake/CMakeLists.txt b/Tests/RunCMake/CMakeLists.txt
index 6e6b9f1..69f8162 100644
--- a/Tests/RunCMake/CMakeLists.txt
+++ b/Tests/RunCMake/CMakeLists.txt
@@ -259,7 +259,7 @@
 add_RunCMake_test(ctest_test)
 add_RunCMake_test(ctest_disabled_test)
 add_RunCMake_test(ctest_skipped_test)
-add_RunCMake_test(ctest_update -DGIT_EXECUTABLE=${GIT_EXECUTABLE})
+add_RunCMake_test(ctest_update)
 add_RunCMake_test(ctest_upload)
 add_RunCMake_test(ctest_fixtures)
 add_RunCMake_test(file)
diff --git a/Tests/RunCMake/ctest_update/test.cmake.in b/Tests/RunCMake/ctest_update/test.cmake.in
index abbef74..25b8423 100644
--- a/Tests/RunCMake/ctest_update/test.cmake.in
+++ b/Tests/RunCMake/ctest_update/test.cmake.in
@@ -9,7 +9,9 @@
 set(CTEST_CMAKE_GENERATOR_PLATFORM      "@RunCMake_GENERATOR_PLATFORM@")
 set(CTEST_CMAKE_GENERATOR_TOOLSET       "@RunCMake_GENERATOR_TOOLSET@")
 set(CTEST_BUILD_CONFIGURATION           "$ENV{CMAKE_CONFIG_TYPE}")
-set(CTEST_UPDATE_COMMAND                "@GIT_EXECUTABLE@")
+
+# FIXME: update test to do someting meaningful with this.
+set(CTEST_UPDATE_COMMAND                "not-actually-used")
 
 set(ctest_test_args "@CASE_CTEST_UPDATE_ARGS@")
 ctest_start(Experimental)