[EnMasse] 0.13.0 release candidate

[Ulf Lilleengen]

Hi all,

I've tagged a release candidate for 0.13.0 which is available here:

https://github.com/EnMasseProject/enmasse/releases/download/0.13.0-rc4/enmasse-0.13.0-rc4.tgz

Please give it a test if you can. I'll be doing some final verification 
on features that are not covered by automatic tests. If things look 
good, I will create the final release from this tag.

-- 
Ulf