webadmin: Host SSH Fingerprint success message shouldn't be in red text

When host SSH fingerprint is fetched successfully
the sucess message is displayed in red.

Change-Id: I28c5a3c82202733a9a628b80a50634c7ccb19d85
Bug-Url: https://bugzilla.redhat.com/1148567
Signed-off-by: Ravi Nori <rnori@redhat.com>