Add unit test for mgr-gitlab-clone, run in CI

.mgr_config/tests/gitlab-utils.sh

@@ -0,0 +1,10 @@
+gitlab_start_log_section() {
+    NAME="$1"
+    HEADER="2"
+    echo -e "\e[0Ksection_start:`date +%s`:${NAME}\r\e[0K${HEADER}"
+}
+
+gitlab_end_log_section() {
+    NAME="$1"
+    echo -e "\e[0Ksection_start:`date +%s`:${NAME}\r\e[0K${HEADER}"
+}