Remove CacheFile cache from APC on write

If APC is enabled on the piwik server, cache files written by the CacheFile
class are stored in the opcode cache. This causes disk io problems when doing
things like loading weblogs into piwik with the import_logs.py script,
especially when running in --disable-bulk-tracking mode. In this scenario,
apache write IO quickly reaches 100% and slows the import to a crawl.
Only use localhost in HttpTest test.
refs  #6311 Do not run autoconf and see if travis works again
Temporarily disable test cc @diosmosis
green screenshot tests build
Fix HttpTest w/ localhost change.
Update UI tests submodule for formless login UI test.
xhprof: Execute aclocal and autoconf only if Gentoo is used.
Require autoload in cli-script-bootstrap.php so geoipUpdateRows.php script will work.
Merge pull request #6320 from sabl0r/gentoo2

xhprof: Execute aclocal and autoconf only if Gentoo is used.
Merge pull request #6315 from brownoxford/delete-cachefile-from-apc-on-write

Remove CacheFile cache from APC on write
Merge remote-tracking branch 'origin' into deprecate_usersettings