Reduce pytest output on CI.

We don't need -v anymore as pytest 2.9 will display full diffs either way.

.appveyor.yml

@@ -14,4 +14,4 @@ install:
   - C:\Python27\python -u scripts\dev\ci_install.py
 
 test_script:
-  - C:\Python34\Scripts\tox -e %TESTENV% -- -v --junitxml=junit.xml
+  - C:\Python34\Scripts\tox -e %TESTENV% -- --junitxml=junit.xml

.travis.yml

@@ -34,7 +34,7 @@ install:
   - python scripts/dev/ci_install.py
 
 script:
-  - tox -e $TESTENV -- -v --cov-report term tests
+  - tox -e $TESTENV -- tests
 
 after_success:
   - '[[ $TESTENV == *-cov ]] && codecov -e TESTENV -X gcov'