gitlab-ci: factor out ctest_start() model into a variable

.gitlab/ci/ctest_configure.cmake

@@ -6,7 +6,7 @@ set(cmake_args
   -C "${CMAKE_CURRENT_LIST_DIR}/configure_$ENV{CMAKE_CONFIGURATION}.cmake")
 
 # Create an entry in CDash.
-ctest_start(Experimental GROUP "${ctest_group}")
+ctest_start("${ctest_model}" GROUP "${ctest_group}")
 
 # Gather update information.
 find_package(Git)

.gitlab/ci/ctest_test_external.cmake

@@ -7,7 +7,7 @@ set(cmake_args
   -C "${CMAKE_CURRENT_LIST_DIR}/configure_$ENV{CMAKE_CONFIGURATION}.cmake")
 
 # Create an entry in CDash.
-ctest_start(Experimental GROUP "${ctest_group}")
+ctest_start("${ctest_model}" GROUP "${ctest_group}")
 
 # Gather update information.
 find_package(Git)

.gitlab/ci/gitlab_ci.cmake

@@ -19,6 +19,7 @@ endif ()
 # Set the build metadata.
 set(CTEST_BUILD_NAME "$ENV{CI_PROJECT_NAME}-$ENV{CMAKE_CONFIGURATION}")
 set(CTEST_SITE "gitlab-ci")
+set(ctest_model "Experimental")
 
 # Default to Release builds.
 if (NOT "$ENV{CMAKE_BUILD_TYPE}" STREQUAL "")