.travis.yml: Suppress the output of unit tests

Because Travis-CI has a limit of the log file to 4MB, this patch
suppress the output of unit tests by setting NOSE_VERBOSE in tox.ini.
tox.ini does not effect when running run_tests.sh locally,
so please run run_tests.sh, if the full log messages are needed.

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

.travis.yml

@@ -12,6 +12,6 @@ install:
   - "pip install tox"
 
 script:
-  - tox -e $TOX_ENV
+  - NOSE_VERBOSE=0 tox -e $TOX_ENV
 
 sudo: false

ryu/tests/run_tests.py

@@ -25,7 +25,7 @@ if __name__ == '__main__':
     cwd = os.getcwd()
     c = config.Config(stream=sys.stdout,
                       env=os.environ,
-                      verbosity=3,
+                      verbosity=int(os.environ.get('NOSE_VERBOSE', 3)),
                       includeExe=True,
                       traverseNamespace=True,
                       plugins=core.DefaultPluginManager())

tox.ini

@@ -6,6 +6,7 @@ deps = -U
        -r{toxinidir}/tools/pip-requires
        -r{toxinidir}/tools/test-requires
 usedevelop = True
+passenv= NOSE_VERBOSE
 commands =
   python ryu/tests/run_tests.py '{posargs}'