Travis: Disable browser tests
Travis: Disable browser tests

Disable running browser tests in Travis for now, since they cause false
errors.

If browser tests are fixed at some point, then they should be
re-enabled. Until that, it's better to have them disabled.

suutari-ai/shoop,shoopio/shoop,suutari-ai/shoop,shoopio/shoop,shoopio/shoop,suutari-ai/shoop