[autotest] Increase wsgi processes.

The cost of each wsgi process is only around 300M
and we can easily afford 6G on d4. Moreover the daemons 
only grow on higher load, so if apache is just idling they
should have a smaller footprint.

TEST=Watched memory as suites were running in puppylab.
BUG=chromium:431794
DEPLOY=apache

Change-Id: I30881bbc1e8b5b9c8298499d34abc0d4cb46e069
Reviewed-on: https://chromium-review.googlesource.com/233961
Tested-by: Prashanth B <beeps@chromium.org>
Reviewed-by: Dan Shi <dshi@chromium.org>
Trybot-Ready: Prashanth B <beeps@chromium.org>
Commit-Queue: Prashanth B <beeps@chromium.org>
1 file changed