[tox] Require ldap3 < 2 for server tests Apparently we are using some constants that got dropped/moved in ldap3 >= 2.0.0 (which came out last week). So stay with version 1.4 until this gets sorted out.

cubicweb source: source-is-missing cubicweb/web/data/jquery.flot.js line length is * characters (>512)