remove yum_key since it doesn’t exist in the yum cookbook 3.0
Merge branch 'fix-yum-key' of github.com:dwradcliffe/cookbook-php-fpm into dwradcliffe-fix-yum-key

Conflicts:
	recipes/default.rb
Merge branch 'dwradcliffe-fix-yum-key'
Remove explicitly defined default value for pm.start_servers