appveyor build should fail on failing tests

[ratanparai]

I'm submitting a...

[x] Bug report  
[ ] Performance issue
[ ] Feature request
[ ] Documentation issue or request
[ ] Other... Please describe:

Current behavior

If test failed in appveyor then the build status shows passing

Expected behavior

If any test fails then the appveyor build status should be failing and a red cross should be shown in build status.

Minimal reproduction of the problem with instructions

write a failing unit or integration test and push it. Travis build will failed where appveyor will pass with all green banner.