tox: Integrate Coveralls.io

To check the code coverage of the unit tests on web, this patch
add integration of Coveralls.io (https://coveralls.io/).

Usage:
  1. Sign in to Coveralls.io with your GitHub account.
  2. Add repos at your account page.
  3. Execute tests on Travis-CI.

Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

.travis.yml

@@ -10,9 +10,12 @@ env:
   - TOX_ENV=pep8
 
 install:
-  - "pip install tox"
+  - pip install tox coveralls
 
 script:
   - NOSE_VERBOSE=0 tox -e $TOX_ENV
 
+after_success:
+  - coveralls
+
 sudo: false

tox.ini

@@ -9,7 +9,7 @@ deps = -U
 usedevelop = True
 passenv= NOSE_VERBOSE
 commands =
-  python ryu/tests/run_tests.py '{posargs}'
+  coverage run --source=ryu ryu/tests/run_tests.py '{posargs}'
 
 [testenv:pep8]
 commands =