[dbapi] Stop shadowing exceptions in get_repository() (closes #2710515)
Exceptions are already handled higher up in the stack so there's no
reason to handle them here. Furthermore, non-ConnectionError exceptions
would get hidden, making debugging harder.
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/entities/ usr/lib/PY_VERSION/site-packages/cubicweb
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/ext/ usr/lib/PY_VERSION/site-packages/cubicweb
debian/tmp/usr/share/cubicweb/cubes/ usr/share/cubicweb/
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/*.py usr/share/pyshared/cubicweb