Websubmit: Fix for Link_Records.py

* Fixes the bug in str.join(recids) in get_recid_and_reportnumber function
  (recids should be converted to strings before calling join function)

Signed-off-by: Sebastian Witowski <sebastian.witowski@cern.ch>
Merge pull request #6 from switowski/Link_Records_fix

Websubmit: Fix for Link_Records.py