Remove README.md as duplicate for .rst one
Remove README.md as duplicate for .rst one

We have two README files in repository, one of them README.md is
looks like GitHub generated one and contains not so much information
as another - README.rst.

Change-Id: Ib24186e5c0ffb5c3334cba197101d9430fa4fe03

openstack/tosca-parser,openstack/heat-translator,openstack/heat-translator,openstack/tosca-parser