Only show fabrics present in the system

Don't show fabrics that need physical WWNs unless they are present.
Showing them is just clutter.

Simplify target summary.

Signed-off-by: Andy Grover <agrover@redhat.com>

@@ -46,8 +46,10 @@ def refresh(self):
 
         UIBackstores(self)
 
-        for fabric_module in RTSRoot().fabric_modules:
-            UIFabricModule(fabric_module, self)
+        # only show fabrics present in the system
+        for fm in RTSRoot().fabric_modules:
+            if (not fm.needs_wwn()) or fm.spec['wwn_list']:
+                UIFabricModule(fm, self)
 
     def ui_command_saveconfig(self, savefile=default_save_file):
         '''

@@ -150,12 +150,7 @@ def refresh(self):
     def summary(self):
         no_targets = len(self._children)
         status = None
-        if self.rtsnode.needs_wwn() and not self.rtsnode.spec['wwn_list']:
-            msg = "Not found"
-        elif no_targets > 1:
-            msg = "%d Targets" % no_targets
-        else:
-            msg = "%d Target" % no_targets
+        msg = "%d Targets" % no_targets
 
         fm = self.rtsnode
         if fm.has_feature('discovery_auth') and fm.discovery_enable_auth: