Watchman filters out haproxy/logshifter

Make Watchman's GearStatePlugin filter out haproxy and logshifter
related processes so it can better determine when to start a gear whose
processes have died.

Bug 1133629
mysql cart: simplify user env var check

Eliminate the "`-n`" test for `OPENSHIFT_MYSQL_START_TIMEOUT` (and
...`_STOP_TIMEOUT`) and replace it with the `set -u` safe
`${OPENSHIFT_MYSQL_START_TIMEOUT:-}` expansion
Merge pull request #5817 from abhgupta/abhgupta-dev

Merged by openshift-bot
Merge pull request #5814 from ncdc/watchman-filter-logshifter-haproxy-bz1133629

Merged by openshift-bot
Merge pull request #5816 from dobbymoodge/mysql_cart_tweak

Merged by openshift-bot