session: fixes login when no cache backend exists

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>
requirements: broken pypi links fix

* Packages removed from pypi have now direct links; this is only a temporary
solution.

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>
requirements: version bumps

* Bumps MySQL-python and beautifulsoup4 to newer versions.

Signed-off-by: Adrian-Tudor Panescu <adrian.tudor.panescu@cern.ch>