If message senders and receivers uses different
wireformat.tightEncodingEnabled options, broker will get marshalling
problem. This is because when openwire messages are converted to
core messages, and later these core messages converted to openwire
messages, the broker uses a mashaller that comes with the connection
used to carry the messages.
For example, if a producer sents a message using option "wireformat
.tightEncodingEnabled=false" and a receiver tries to receive it
using 'true' for the same option, it'll never get it because the
broker will fail to use a "tight encoding" marshaller to
decode a 'loose encoded' message.
To fix the problem, we always use 'tight encoding' for internal
message converters.
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