improve reporting on communication failures

[GoogleCodeExporter]

1. for incoming channels: do not generate error-report communication failures 
unless communication failed for eg 5 times. 
   would not be to hard: save nr of retries in eg counter?

2. for outgoing files: do not generate error-report unless outgoing file is 
retried eg 5 times. (is now: report for each failed communication)
   bots now keeps track of the number of resends for outgoing files.
   so probably the best place to dectect this is in the automaticmaintenance, when bots create the report for the run.

Note that the errors will be displayed in monitor, but no email-report is send. 

Original issue reported on code.google.com by hjebb...@gmail.com on 6 Sep 2013 at 5:45

[GoogleCodeExporter]

for incommunication:
for each channel you can set the number of failed communications before this is 
reported.

Original comment by hjebb...@gmail.com on 17 Mar 2014 at 4:59

• Changed state: Started
• Added labels: Type-New
• Removed labels: Type-Improve

[GoogleCodeExporter]

Original comment by hjebb...@gmail.com on 10 Sep 2014 at 2:43

• Changed state: Done