Revert travis to stable state

Signed-off-by: kartik sibal <kartiksibal@gmail.com>

Author: kartiksibal

.travis.yml

@@ -7,7 +7,6 @@ install:
 
 before_script:
   - pycodestyle --exclude=migrations,settings.py,lib,tests --max-line-length=100 .
-  - cd app/
 
 script:
   - python3.6 -m pytest -v tests/