add CI for publising lodspeakr to marcus test, checking out current SHA and running composer

.gitlab-ci.yml

+stages:
+- marcus_test
+
+marcus_test:
+  variables:
+    MARCUS_SERVER: $MARCUS_TEST_SERVER_IPV6
+  image: oyvindlg/gitlab-ci-library:ansible-cgi
+  stage: "marcus_test"
+  before_script:
+  - eval $(ssh-agent -s)
+  - echo $MARCUS_TEST_KEY | base64 --decode | ssh-add -
+
+ script:
+  - echo "debug"
+  - ssh -6 -o "StrictHostKeyChecking=no" $MARCUS_USER@$MARCUS_SERVER "cd $MARCUS_HOME && git fetch && git checkout $CI_COMMIT_SHA && composer install --no-dev"
+  tags:
+  - spes
+