Revert "Speed up the skipping of the build"

This reverts commit bffff57.

The original commit breaks Docker service on Travis CI

Author: PeterDaveHello

.travis.yml

@@ -5,6 +5,13 @@ sudo: false
 
 language: generic
 
+services:
+    - docker
+addons:
+  apt:
+    packages:
+      - docker-ce
+
 before_install:
   - source functions.sh && images_updated $TRAVIS_COMMIT_RANGE || tests_updated $TRAVIS_COMMIT_RANGE || travis_terminate
 

travis.yml.template

@@ -3,6 +3,13 @@ sudo: false
 
 language: generic
 
+services:
+    - docker
+addons:
+  apt:
+    packages:
+      - docker-ce
+
 before_install:
   - source functions.sh && images_updated $TRAVIS_COMMIT_RANGE || tests_updated $TRAVIS_COMMIT_RANGE || travis_terminate