Add validation script for min env vars documentation
Add validation script for min env vars documentation

Change-Id: I46ffa01d0097916055857c3f968e716e0229795f
Partially-implements: blueprint add-min-env-vars-gate

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