making sure apache supports version 2.4

0.0.37 of stack_commons sets the apache2 cookbook's depend to the
correct version.

Signed-off-by: Matthew Thode <mthode@mthode.org>
Merge branch 'pfire' of github.com:rackspace-cookbooks/phpstack into pfire

Signed-off-by: Matthew Thode <mthode@mthode.org>