Replace deprecated :rubygems source
Replace deprecated :rubygems source

Fix deprecation warnings thrown by bundler:

  The source :rubygems is deprecated because HTTP requests are insecure.
  Please change your source to 'https://rubygems.org' if possible,
  or 'http://rubygems.org' if not.

Fixes: bug #1175767
Change-Id: I83082c6ef8d4c8c628bcb812bda2fe3c6dd6cb34

dprince/puppet-nova,esteve/puppet-nova,datacentred/puppet-nova,JioCloud/puppet-nova,apenney/puppet-nova,balle/puppet-nova,arnaudmorinol/puppet-nova,balle/puppet-nova,javiplx/puppet-nova,ody/puppet-nova,esteve/puppet-nova,dprince/puppet-nova,nhinds/puppet-nova,aquto/puppet-nova,DylanYu/puppet-nova,apenney/puppet-nova,DarkHorseComics/puppet-nova,stratustech/puppet-nova,pllopis/puppet-nova,madkiss/puppet-nova,varunarya10/puppet-nova,aquto/puppet-nova,ody/puppet-nova,JioCloud/puppet-nova,TelekomCloud/puppet-nova,varunarya10/puppet-nova,datacentred/puppet-nova,nhinds/puppet-nova,stratustech/puppet-nova,cristifalcas/puppet-nova,larsks/puppet-nova