Update Rubygems to 3.0.2
Update Rubygems to 3.0.2

Bump Chef 15 to the latest and greatest rubygems.

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

Tensibai/chef,mattray/chef,MsysTechnologiesllc/chef,mattray/chef,chef/chef,chef/chef,tas50/chef-1,mwrock/chef,MsysTechnologiesllc/chef,jaymzh/chef,nvwls/chef,jaymzh/chef,higanworks/chef,nvwls/chef,Tensibai/chef,higanworks/chef,Tensibai/chef,Tensibai/chef,mattray/chef,mattray/chef,gene1wood/chef,nvwls/chef,nvwls/chef,mattray/chef,higanworks/chef,higanworks/chef,Tensibai/chef,nvwls/chef,tas50/chef-1,tas50/chef-1,mwrock/chef,gene1wood/chef,chef/chef,jaymzh/chef,gene1wood/chef,jaymzh/chef,MsysTechnologiesllc/chef,nvwls/chef,MsysTechnologiesllc/chef,chef/chef,gene1wood/chef,mwrock/chef,higanworks/chef,tas50/chef-1,mwrock/chef