Implement asynchronous search for groups.

Use the filter generation code to search on multiple fields.

ipa-admintools/ipa-findgroup

@@ -50,7 +50,9 @@ def main():
         client = ipaclient.IPAClient()
         groups = client.find_groups(args[1])
 
-        if len(groups) == 0:
+        counter = groups[0]
+        groups = groups[1:]
+        if counter == 0:
             print "No entries found for", args[1]
             return 0