Update CHANGELOG for v1.2.0 release
Update CHANGELOG for v1.2.0 release

gozer/nubis-consul,limed/nubis-consul,gozer/nubis-consul,gozer/nubis-consul,limed/nubis-consul,Nubisproject/nubis-consul,Nubisproject/nubis-consul,tinnightcap/nubis-consul,Nubisproject/nubis-consul,tinnightcap/nubis-consul