Fix permissions for plugin files downloaded from update center
Fix permissions for plugin files downloaded from update center

Signed-off-by: Diego Marcet <8354336224c63279aadd00a9621757ef4fdf31fc@controlshiftlabs.com>

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