[ticket/227] Reduce size of test matrix

B3P-227

.travis.yml

@@ -6,9 +6,7 @@ php:
   - 5.5
 
 env:
-  - DB=mariadb
   - DB=mysql
-  - DB=postgres
 
 branches:
   except:
@@ -44,6 +42,13 @@ script:
   - cd ../phpBB/ext/board3/portal
   - ../../../vendor/bin/phpunit --configuration travis/phpunit-$DB-travis.xml
 
+matrix:
+  include:
+    - php: 5.4
+      env: DB=mariadb
+    - php: 5.4
+      env: DB=postgres
+
 notifications:
   email:
     recipients: