Remove tests in django 1.6 and 1.7

Author: patrick91

.travis.yml

@@ -49,10 +49,6 @@ env:
 matrix:
   fast_finish: true
   include:
-  - python: '2.7'
-    env: TEST_TYPE=build DJANGO_VERSION=1.6
-  - python: '2.7'
-    env: TEST_TYPE=build DJANGO_VERSION=1.7
   - python: '2.7'
     env: TEST_TYPE=build DJANGO_VERSION=1.8
   - python: '2.7'