Add support for running all tests on travis.

Move travis before_script to a script in extras.
Add apache and mysql confs to extras.
Modify test harnesses to be travis aware.
  (Make sure and send some output, sleep occasionally)
Switch migration urls to non-redirecting www.
Occasionally output while in Travis mode to prevent travis stopping.
Added a mode to just test install to allow the build matrix to only test
   the install in one build, not all.

references #1328