Update md5 for multiselect, and pin it to 1.0.1

python fetch_packages fails for contrail-webui-third-party, md5 has
changed for multiselect, so correcting it, and pin it to 1.0.1 in order
to avoid future errors…

Change-Id: I5bf79420d995ff26c2a1714363ed5ce5d9634af4