Fix display of a node with hawk-server role

Yes, it's ugly to know about another barclamp :/

https://bugzilla.novell.com/show_bug.cgi?id=888516
(cherry picked from commit 18ec92448294bfdbea087193b2b2e66ac8c697cb)
Merge pull request #1101 from vuntz/hawk-role-roxy

Fix display of a node with hawk-server role