Hotfix/1.3.0

I have noticed, that hostmanager is creating duplicate entries, when some ec2 nodes dies or was killed, then what happens when the node is recreated the old entry is not being replaced but it is added as a new one.

The interpretation of this file however depends on underlying OS, some will pick up first entry, some will try round robin fashion to resolve DNS name.

I believe this patch would solve the issue.