resident: Add SSN and DOB to form_field_hash
resident: Add SSN and DOB to form_field_hash

These fields are easy, because both of our sample PDFs use the same field names
for them.

dmjurg/districthousing,jrunningen/districthousing,MetricMike/districthousing,meiao/districthousing,codefordc/districthousing,MetricMike/districthousing,lankyfrenchman/dchousing-apps,dmjurg/districthousing,jrunningen/districthousing,MetricMike/districthousing,codefordc/districthousing,jrunningen/districthousing,dclegalhackers/districthousing,uncompiled/districthousing,dclegalhackers/districthousing,meiao/districthousing,uncompiled/districthousing,adelevie/districthousing,codefordc/districthousing,uncompiled/districthousing,lankyfrenchman/dchousing-apps,dclegalhackers/districthousing,adelevie/districthousing,codefordc/districthousing,meiao/districthousing,adelevie/districthousing,uncompiled/districthousing,MetricMike/districthousing,meiao/districthousing,dmjurg/districthousing,dclegalhackers/districthousing,codefordc/districthousing,uncompiled/districthousing,jrunningen/districthousing,dmjurg/districthousing,lankyfrenchman/dchousing-apps,adelevie/districthousing,meiao/districthousing,lankyfrenchman/dchousing-apps,jrunningen/districthousing