Processing times Part 2

Part 2 of PR #69 
1.  Attribute names now have no spaces or dashes [issue 244](https://github.com/18F/foia-hub/issues/244)
2. Relevant tests added

About 120+ have different names. I put them all in this file to be explicit about which ones needed to be mapped and which ones didn't. I did, however, update the headers to 
```
foia_hub_name,top_level_agency_name,foia.gov_data_name
```