[urlpublish] RESTPathEvaluator now use vid_from_rset
This avoid cases where vid may be unexpectedly overwritten. For instance when
you define a custom vid for a mime type in VID_BY_MIMETYPE, it will currently be
overriden by the URL publisher when you access to /<etype> with the proper
Accept header.
To do so, a new 'check_table' argument is introduced, which may cause bw
compatibility problems if the function has been monkey-patched.
Also pep8 a bit the tests.
Closes #5705835
\.svn
^build$
^dist$
\.egg-info$
^.tox$
\.pyc$
\.pyo$
\.bak$
\.old$
\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$
\.old$
syntax: regexp
.*/data.*/database/.*\.sqlite
.*/data.*/database/.*\.config
.*/data/database/tmpdb.*
.*/data/ldapdb/.*
.*/data/uicache/
.*/data/cubes/.*/i18n/.*\.po
^doc/html/
^doc/doctrees/
^doc/book/en/devweb/js_api/
^doc/_build
^doc/js_api/
data/pgdb/
data.*/pgdb.*