TST: run windows tests so failures show up in appeveyor

Author: jreback

appveyor.yml

@@ -94,5 +94,4 @@ install:
 test_script:
   # tests
   - cmd: activate pandas
-  - cmd: cd \
-  - cmd: python -c "import pandas; pandas.test(['--skip-slow', '--skip-network'])"
+  - cmd: test.bat

test.bat

@@ -1,4 +1,3 @@
 :: test on windows
 
-:: nosetests --exe -A "not slow and not network and not disabled" pandas %*
-pytest pandas
+pytest --skip-slow --skip-network pandas