Ampoule logging is exceedingly verbose about ampoule

[ldanielburr]

Now that #29 has merged, we could consider if some of the flexibility of twisted.logger's improved event formatting support solves this problem.

[ldanielburr]

Brief update: so this is actually kind of hard, because in the example shown here, the log output in question is being generated by a combination of twisted.python.log and twisted.logger, which makes controlling the formatting harder.

Example: run the ampoule test suite with trial, and note all the occurrences of "[-]", even though the new logger code is in use within ampoule. The reason we see "[-]" instead of "[whatever.the.logger.namespace.is]" is because trial is still using t.p.log, which ignores the log_namespace event key altogether.

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@ldanielburr If anyone were to have time for this, the right way to attack it would be "eliminate uses of twisted.python.log"