Add note about heat being busted for development
Add note about heat being busted for development

Heat development environments don't work at all.

As such document this so folks avoid them unless they want to
work on making them better.

Change-Id: Ibe3296660d30ccc24213c272ef379e6d3e2c21f2

openstack/kolla,dardelean/kolla-ansible,mandre/kolla,nihilifer/kolla,GalenMa/kolla,stackforge/kolla,openstack/kolla,mrangana/kolla,dardelean/kolla-ansible,nihilifer/kolla,coolsvap/kolla,tonyli71/kolla,mrangana/kolla,tonyli71/kolla,rahulunair/kolla,GalenMa/kolla,coolsvap/kolla,mandre/kolla,rahulunair/kolla,coolsvap/kolla,intel-onp/kolla,mandre/kolla,dardelean/kolla-ansible,intel-onp/kolla,stackforge/kolla,stackforge/kolla