Remove Centos5 from travis testing
Remove Centos5 from travis testing

CentOS 5 in travis really doesn't work in just about every cookbook.

Signed-off-by: Tim Smith <764ef62106582a09ed09dfa0b6bff7c05fd7d1e4@chef.io>

beubi/cookbook-php,opscode-cookbooks/php,rshade/php,beubi/cookbook-php,sergiuionescu/php,chef-cookbooks/php,rshade/php,opscode-cookbooks/php,Sauraus/php,sergiuionescu/php,chef-cookbooks/php,Sauraus/php