requirements: version bumps
requirements: version bumps

* Bumps MySQL-python and beautifulsoup4 to newer versions.

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

NOTE: beware, patch amended by Tibor to use new file names

tiborsimko/invenio,inveniosoftware/invenio,inveniosoftware/invenio,tiborsimko/invenio