Fix: Ensure the Java JUL messages are correctly formatted

It is possible for log records to contain messages that need some
formatting, for example if the string contains localized elements
or if the log(Level, String, Object[]) method is used.

In these cases, we need to make sure to format the string and not
pass the "raw" string to the tracepoint.

This only applies to the JUL API. log4j 1.2.x did not handle such
formatting, although log4j 2.x does.

Signed-off-by: Alexandre Montplaisir <alexmonthy@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>