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.
Merge pull request #45 from tvaughan77/NAN-866

NAN-866 Managing the maven failsafe plugin under opower-parent
NAN-866 fixing previous commit per Steve's excellent eye
Merge pull request #46 from tvaughan77/NAN-866

NAN-866 fixing previous commit per Steve's excellent eye