Remove -master from README.md
Remove -master from README.md

The removal of the foo-master labels left the README.md in an
incorrect state.  Fix that problem.

Change-Id: I61802a18c0f424cd9e5c16b988d5fbd5d462afac

HackToday/kolla,intel-onp/kolla,negronjl/kolla,rajalokan/kolla,LoHChina/kolla,nihilifer/kolla,coolsvap/kolla,rajalokan/kolla,limamauricio/mykolla,invenfantasy/kolla,meticulo3366/kolla,rajalokan/kolla,coolsvap/kolla,negronjl/kolla,stackforge/kolla,LoHChina/kolla,mrangana/kolla,dardelean/kolla-ansible,stackforge/kolla,limamauricio/mykolla,toby82/kolla,bdastur/kolla,jakedahn/kolla,fdumpling/kolla,nihilifer/kolla,dardelean/kolla-ansible,toby82/kolla,intel-onp/kolla,meticulo3366/kolla,chenzhiwei/kolla,HackToday/kolla,thetrav/kolla,tonyli71/kolla,jasonbrooks/kolla,mandre/kolla,HackToday/kolla,rahulunair/kolla,fdumpling/kolla,limamauricio/mykolla,GalenMa/kolla,jakedahn/kolla,jasonbrooks/kolla,jakedahn/kolla,GalenMa/kolla,invenfantasy/kolla,negronjl/kolla,rahulunair/kolla,stackforge/kolla,openstack/kolla,openstack/kolla,dardelean/kolla-ansible,chenzhiwei/kolla,toby82/kolla,mrangana/kolla,mandre/kolla,brk3/kolla,brk3/kolla,coolsvap/kolla,LoHChina/kolla,bdastur/kolla,chenzhiwei/kolla,tonyli71/kolla,thetrav/kolla,invenfantasy/kolla,mandre/kolla,fdumpling/kolla