Update .travis.yml

Author: Sunny Raj Rathod

.travis.yml

@@ -16,9 +16,7 @@ before_script:
   - git submodule update --remote --recursive
 
 script:
- - nosetests
- - coverage run setup.py test
- - coveralls
+ - nosetests --with-coverage -cover-package=authorizenet
  - python setup.py install
  - cd sample-code-python
  - python ./test-runner.py