change extlite connection handling: connection may not be shared among threads but it's fine to have multiple connections open in several threads (as demonstrated by unittest_extlite)
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/server/ usr/lib/PY_VERSION/site-packages/cubicweb
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/sobjects/ usr/lib/PY_VERSION/site-packages/cubicweb
debian/tmp/usr/share/cubicweb/schemas/ usr/share/cubicweb/
debian/tmp/usr/share/cubicweb/migration/ usr/share/cubicweb/