tests/test-gendoc-pt_BR.t

wireprotov2: remove functions for creating response frames from bytes

All code in the actual server uses oncommandresponsereadyobjects().

Test code was ported to that method. This resulted in a handful of
subtle test changes.

Differential Revision: https://phab.mercurial-scm.org/D4924

#require docutils gettext

  $ $TESTDIR/check-gendoc pt_BR
  checking for parse errors