Cougar logger inserts comma's while rendering collections

[eswdd]

Cougar uses "," (comma) as separator while rendering collections. This leads to request logs of variable field length which will break any downstream log parser tools, such as ones for importing into a database.

We should use the pipe character as the default.

[eswdd]

Change had already been made to make this configurable during the open sourcing. Now am changing the default value of the controlling property "cougar.eventLogRecord.collectionSeperator"