Delimiter for KeyValue Parser

[Dylan-M]

Currently we have a dataset from a customer that has they KeyValue pairs separated by pipe characters instead of spaces.
src=10.220.2.12|srcPort=20331|dst=35.186.161.12|dstPort=443|blockReason=|srcPreNAT=10.220.2.12|srcPreNATPort=20331|dstPreNAT=153.2.246.7|dstPreNATPort=8080

Add a delimiter character option parameter to the KV Parser.

For this customer in the field, we'll be using regex parsing to handle this until such time as this feature is available.