Disable Host key checking to try to get jutil deploy key to work.

.gitlab-ci.yml

 image: "python:3.5"
 
 before_script:
+  # Check and print Python version
   - python --version
-  - pip install hyperspy tqdm cmocean nose
-  - eval $(ssh-agent -s)  # Run ssh-agent
-  - ssh-add <(echo "$SSH_KEY_JUTIL")  # Add SSH key for jutil to the agent store
+  ####- pip install hyperspy tqdm cmocean nose
+  # Run ssh-agent, "-s" forces generation of Bourne shell (/bin/sh) commands on stdout:
+  - eval $(ssh-agent -s)
+  # Add SSH key for jutil to the agent store:
+  - ssh-add <(echo "$SSH_KEY_JUTIL")
+  # For Docker builds disable host key checking. Be aware that by adding that
+  # you are suspectible to man-in-the-middle attacks.
+  # WARNING: Use this only with the Docker executor, if you use it with shell
+  # you will overwrite your user's SSH config.
+  - mkdir -p ~/.ssh
+  - '[[ -f /.dockerenv ]] && echo -e "Host *\n\tStrictHostKeyChecking no\n\n" > ~/.ssh/config'
   - echo "Done"
 
 stages: