XD-624 Fix TCP Syslog Deserializer

Needs a linefeed serializer instead of th default CRLF.
XD-614 Channel Registry Conversion Improvements

Convey contentType and originalContentType in message to allow
proper decoding on the inbound side.

For Redis, add the headers to the payload of the transported
message.

XD-614 Polishing

PR Comments.
XD-622 Various Javadoc Fixes

Remove warnings from build.
XD-546 Add fieldvaluecounter display command
  - Added display command with name, pattern and size as options
  - Fixed FieldValueCounterResource to include getFieldValueCounts method.
  - Added display fieldvaluecounter display method that lists the fieldvaluecounters ordered by values
  - Added fieldvaluecounter tests