Added new documentconverter.properties item com.openexchange.documentconverter.errorCacheMaxCy cleCount

This item determines the number of cycles, a job, associated with a job hash value, is added to the error cache.
One cycle starts after adding a job to the error cache and ends after the errorCacheTimeout has been reached.
After reaching the given maximum cycle count, the job is not removed from the error cache anymore and will be held within the error cache for the rest of the runtime of the current backend instance.
Since the error cache is not persistent, the cycle counter for each job hash is reset after a restart of the backend instance.

Set to 0 to disable the error cache handling.

Default value: 5