Commit f528f949 (tdf#106953 RTF import:
fix missing paragraph left margin, 2017-05-16) fixed a problem around
inheriting indents from numbering styles vs paragraph styles, but it
turns out that document was rather special and in general the old
behavior was correct.  So fix that bug in a different way again, this
time without less side-effects.

The trick is that in case the level numbers group in a list definition
ends with \u59 (instead of an ASCII ';'), then that group is considered
to be invalid by Word. RTF import already was aware of this, but it
wasn't known that when this invalid state is reached, that also means
that the indents of the list level definitions should be ignored. So in
general not putting direct formatting on a paragraph is a good thing:
that way in case the paragraph style and the number style both has
indent infos, then the numbering style wins, and that is what we want --
but in case \u59 appears in the list definition, then the indentation
from the numbering style should be ignored.

So fix up the tokenizer to import the indentation from list levels in
general, ignore it for invalid list levels, and then we can remove the
direct formatting from the paragraphs, which fixes this bug and keeps
the old one fixed as well.

This required fixing up two poor testcases, which tested paragraph
properties, but in fact are interested in the real source of
indentation, which is now the numbering style. Visually both bugdocs are
unchanged.

Change-Id: I6390aa870659a8ad02ba5512d84dea34dba29e9f