[test] cleanup

[test] update tests broken by changes on attributes permissions handling in yams (add/delete replaced by update

remove #<formid> from url used to redirect after a validation error

[test] no more __cubicweb_internal_field__ value displayed on password widget

[test] inline-creation requires petype argument to be selectable. Fix arguments order to make it clearer that 'template' is an argument of the test class .view method

[test] skip test when fop failed

[test] don't display progress bar when testing checkintegrity

[test api] rename _user_session to user_groups_session, fix its arguments and return only the session, not (user, session) to make things clearer

auto-delete relation with single cardinality using execute, not unsafe_execute, so permissions are correctly checked

fix tests

add */*.py to default MANIFEST.in to avoid pb such as #719282 in the future

fix #615379 by checking admin user exists instead of making think everything is fine