Quarantine unstable test failing continuous build.

The test for remote Android dependencies is failing on continuous builds
when it executes first. For example:

https://travis-ci.org/rgladwell/m2e-android/jobs/33977822

This test has been quarantined temporarily to ensure the stability of
the continuous build:

See here for more information:

https://github.com/rgladwell/m2e-android/issues/254