Search: Handle errors when queried ID does not belong to ID space #12
Description
As it is now, the API returns an ugly:
pysolr.SolrError
SolrError: Solr responded with an error (HTTP 400): [Reason: Invalid Number: 529919a8e4b0bd2cefcdf1ee]
when making a query with a specific ID space and and ID that does not belong to it. For example:
http://localhost:5000/api?facebook_artist=529919a8e4b0bd2cefcdf1ee