NAN-866 Managing the maven failsafe plugin under opower-parent

This commit will execute the failsafe plugin under the integration-test phase and kill the build if any IntTest** classes fail.  Furthermore, IntTests are defaulted to run in reverse-alphabetical order every other order as a smoke test against "down stream" IntTests accidentally depending on "up stream" test fixtures that should have been cleaned up.
This isn't right... you added the surefire plugin config under the *maven-failsafe-plugin* <plugin>, so that now the maven-failsafe-plugin is duplicated. Lines 174-186 that you added should be moved up to line 169. That, or github's display of the diff is lying to me.

Also, can you add mention of the new surefire config to the release notes?