Update pysolr so invalid xml characters don't cause solr imports to fail [MJ-887]
Merge pull request #801 from DirectEmployers/invalid-xml-chars

Update pysolr so invalid xml characters don't cause solr imports to fail [MJ-887]
Simplified edit_item logic a bit.
Got rid of a redundant try/except
Properly guarded against invalid int conversions.
Made sure title of form reflected action (Add Partner, Add Contact, Edit
Contact)
Primary contact information no longer required to create a partner.