* Exclude some storage engines from Travis to conserve
  build time and disk usage per job. Exluded:
  TOKUDB MROONGA SPIDER OQGRAPH PERFSCHEMA SPHINX
* Increase travis_wait from default 20m to 30 for MTR
* Use travis_wait for long running MTR command (wait
  30m instead of default 20m)
* Increase testcase-timeout to 20m for OSX, 2m for Linux
* Set ccache size only on Linux, adjust timeout again
* Increase cache push timeout to 5 mins
* Remove AWS defines, not needed
* Remove commented out ASAN rules, has been disabled
  previously since it has a significant impact on job
  runtime, should be used more in buildbot instead
* Misc cleanup and fixes