[fti] backout 166c6f7b1be4 * breaks tests * see next commit for a better solution

[py3k] Fix unicode added in commit 2350424585f8

[server/ldap] deal with unicode or str coming out of ldap It seems we can get either, I've no idea in which exact circumstances, so this should let us work with both.

[test] pull yapps from Logilab's github Fixes a couple of failures, pull request is almost a year old (https://github.com/smurfix/yapps/pull/2).

[pkg] bump yams requirement to 0.41.1 Needed by changeset c9321aedfbf9.

[entities] import range from six.moves

merge head published by accident

[fti] Improve big table reindexation * Slice the reindexing in batches of 1000 entities. * Make the output more verbose. Closes #3621392

[tox] Reference requirements.txt for hooks environment The file existed but was not referenced.

[devtools/testlib] Remove assertions about direct usage of CubicWebTC/AutomaticWebTest The point is to be able to use a test runner other than pytest (e.g. nose2, nosetests or py.test) to run CubicWeb test suite. The issue is that most other test loaders inspects members of all base classes of test case classes to determine test methods and it hits this `config` property (actually executing it), which breaks the assertion. So just return None instead of failing. Closes #7817147.