Catch all the errors when BigTool send/receive message to/from other modules.

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/f2f200910@238 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/bigtool/bigtool.py

@@ -239,7 +239,7 @@ class BigTool(Cmd):
 
            reply, env = self.cc.group_recvmsg(False)
            print("received reply:", reply)
-        except ISC.CC.SessionError:
+        except:
             print("Error communication with %s" % groupName)