Firebird seems a lost cause, let's try testing on HipHop

.travis.yml

@@ -5,17 +5,9 @@ php:
   - 5.3
   - 5.4
   - 5.5
-
-before_install:
-  - sudo apt-get update -qq
-  - sudo apt-get install -qq firebird2.5-super firebird2.5-dev
-  - sudo sed /ENABLE_FIREBIRD_SERVER=/s/no/yes/ -i /etc/default/firebird2.5
-  - cat /etc/default/firebird2.5 | grep ENABLE_FIREBIRD_SERVER
-  - sudo service firebird2.5-super start
+  - hhvm
 
 before_script:
-  - sudo apt-get install php5-interbase -qq
-  - sudo /etc/init.d/php5-fpm restart
   - sh -c "psql -c 'DROP DATABASE IF EXISTS test;' -U postgres"
   - sh -c "psql -c 'create database test;' -U postgres"
   - sh -c "mysql -e 'create database IF NOT EXISTS test;'"