Exclude mysql test on Python 3

Author: Fantomas42

.travis.yml

@@ -11,6 +11,13 @@ env:
     - DATABASE_ENGINE=postgres
     - DATABASE_ENGINE=mysql
 matrix:
+    exclude:
+        - python: 3.2
+          env: DATABASE_ENGINE=mysql
+        - python: 3.3
+          env: DATABASE_ENGINE=mysql
+        - python: 3.4
+          env: DATABASE_ENGINE=mysql
     fast_finish: true
 install:
     - pip install -U setuptools