That didn't work so lets go back to using the default ruby image and test php against php7

.gitlab-ci.yml

 # specify what docker image
 # go with the default image for now and mangle it
-image: debian:jessie
+#image: debian:jessie
 
 stages:
   - test
@@ -14,7 +14,7 @@ php-syntax-check:
   script:
    - apt-get clean
    - apt-get update
-   - apt-get install -y php5-cli        
+   - apt-get install -y php-cli
    - php -l htdocs/index.php
    - find components -name *.php | xargs -n 1 php -l
    - find plugins -name *.php | xargs -n 1 php -l