skyring: Corrected extra check for node existence
skyring: Corrected extra check for node existence

There was an issue after task framework integration.
Corrected the same.

Change-Id: I7bc8f7ad25bbad95a96417742236e0c2e93f1114
Signed-off-by: Shubhendu Tripathi <abf833e62503b33bb0dfae62bb381d87d91f8de1@redhat.com>

skyrings/skyring,skyrings/skyring,skyrings/skyring,skyrings/skyring