limit deployments to relevant branches

Author: Dennis Schwartz

.travis.yml

@@ -6,13 +6,13 @@ services:
 jobs:
   include:
   - stage: test
-    before_install: 
     install:
     - pip install -r requirements.txt
     script:
     - python manage.py makemigrations
     - python manage.py migrate
   - stage: deploy-dev
+    if: branch = master
     before_script:
     - docker pull philm/ansible_playbook
     - git clone https://github.com/biojs/biojs-backend-ansible.git