added doctrine to travis-ci build

Author: wachterjohannes

.scrutinizer.yml

@@ -1,2 +1,4 @@
 tools:
-    external_code_coverage: true
+    external_code_coverage:
+        timeout: 300
+        runs: 6

.travis.yml

@@ -1,5 +1,8 @@
 language: php
 
+services:
+  - mysql
+
 php:
   - 5.5
   - 5.6
@@ -8,12 +11,16 @@ php:
 
 env:
   - STORAGE=array
+  - STORAGE=doctrine
 
 install:
    - composer self-update
    - composer update
    - wget https://scrutinizer-ci.com/ocular.phar
 
+before_script:
+  - mysql -e 'create database task_test;'
+
 script:
    - phpunit -c phpunit.xml.dist --coverage-clover=coverage.clover