Ensure tests run with expected docker image

This has been working so far since the tests have only cared about
Ubuntu as a target. Now that RedHat is an option, the default needs to
be overriden.

Author: danielwhite

.travis.yml

@@ -50,10 +50,10 @@ before_install:
 
 script:
   # Test 1
-  - sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo1 -e mongodb_version=${MONGODB_VERSION}
+  - sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo1 -e mongodb_version=${MONGODB_VERSION} -e image_name=${DISTRIBUTION}:${DIST_VERSION} 
     # Idempotence test
   - >
-    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo1 -e mongodb_version=${MONGODB_VERSION}
+    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo1 -e mongodb_version=${MONGODB_VERSION} -e image_name=${DISTRIBUTION}:${DIST_VERSION}
     | grep -q 'changed=0.*failed=0'
     && (echo 'Idempotence test: pass' && exit 0)
     || (echo 'Idempotence test: fail' && exit 1)
@@ -63,11 +63,11 @@ script:
 
   # Test 2
   - >
-    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo1 
+    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo1 -e image_name=${DISTRIBUTION}:${DIST_VERSION}
     -e mongodb_version=${MONGODB_VERSION} -e mongodb_security_authorization='enabled'
     # Idempotence test
   - >
-    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo1 
+    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo1 -e image_name=${DISTRIBUTION}:${DIST_VERSION}
     -e mongodb_version=${MONGODB_VERSION} -e mongodb_security_authorization='enabled'
     | grep -q 'changed=0.*failed=0'
     && (echo 'Idempotence test: pass' && exit 0)
@@ -78,11 +78,11 @@ script:
 
   # Test 3
   - >
-    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo 
+    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo -e image_name=${DISTRIBUTION}:${DIST_VERSION}
     -e mongodb_version=${MONGODB_VERSION} -e mongodb_replication_replset='testrs'
     # Idempotence test
   - >
-    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo 
+    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo -e image_name=${DISTRIBUTION}:${DIST_VERSION}
     -e mongodb_version=${MONGODB_VERSION} -e mongodb_replication_replset='testrs'
     | grep -q 'changed=0.*failed=0'
     && (echo 'Idempotence test: pass' && exit 0)
@@ -93,12 +93,12 @@ script:
 
   # Test 4
   - >
-    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo 
+    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo -e image_name=${DISTRIBUTION}:${DIST_VERSION}
     -e mongodb_version=${MONGODB_VERSION} -e mongodb_replication_replset='testrs'
     -e mongodb_security_authorization='enabled'
     # Idempotence test
   - >
-    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo 
+    sudo ansible-playbook -i tests/hosts tests/site.yml -e target=mongo -e image_name=${DISTRIBUTION}:${DIST_VERSION}
     -e mongodb_version=${MONGODB_VERSION} -e mongodb_replication_replset='testrs'
     -e mongodb_security_authorization='enabled'
     | grep -q 'changed=0.*failed=0'