Test on CentOS 6.9 in TK
Test on CentOS 6.9 in TK

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

opscode-cookbooks/jenkins,Dispader/jenkins,opscode-cookbooks/jenkins,chef-cookbooks/jenkins,Dispader/jenkins,opscode-cookbooks/jenkins,chef-cookbooks/jenkins,dshvedchenko/jenkins,gshively11/jenkins,dshvedchenko/jenkins,b-dean/jenkins,dshvedchenko/jenkins,chef-cookbooks/jenkins,gshively11/jenkins,b-dean/jenkins,juliandunn/jenkins,gshively11/jenkins,b-dean/jenkins,juliandunn/jenkins,Dispader/jenkins,juliandunn/jenkins