[ldapfeed] re-enable ldap tests for python 3.7
This was disabled because ldap3<2 wasn't compatible with python 3.7
While I'm here, drop unseless newline.
missing-dep-for-interpreter make => make | build-essential | dpkg-dev (usr/*/cubicweb/skeleton/debian/rules)embedded-javascript-library usr/share/cubicweb/cubes/shared/data/jquery.js