add: late commit of drbd/tcptunnel errors

ccnode/errors.py

@@ -106,3 +106,13 @@ class SendFileJobError(XferJobError):
     '''
     '''
     pass
+    
+class DrbdCopyJobError(JobError):
+    '''
+    '''
+    pass
+
+class TCPTunnelJobError(JobError):
+    '''
+    '''
+    pass