Add ssh key in testinfra job

.gitlab-ci.yml

@@ -68,6 +68,8 @@ testinfra:
   stage: test
   image: docker.greenhost.net/openappstack/bootstrap/bootstrap-ci
   script:
+    - eval $(ssh-agent -s)
+    - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add - > /dev/null
     - cd test/
     - py.test -v --connection=ansible --ansible-inventory=./inventory.yml --hosts='ansible://*'
   cache: