fix python-mysql

.travis.yml

@@ -14,7 +14,7 @@ before_script:
 before_install:
   - sudo apt-get update -qq
   - sudo apt-get install python-psycopg2 python3-psycopg2
-  - sudo apt-get install python-mysql python3-mysql
+  - sudo apt-get install python-mysql
 # command to install dependencies, e.g. pip install -r requirements.txt --use-mirrors
 install: 
   - "pip install -r requirements.txt"