Fix filter "description" in /electioneering/

[hcaofec]

What we’re after

When filtering for description in /electioneering/, it does not filter correctly.

For example, when filtering for 'house', the backend query looks like this:

https://api.open.fec.gov/v1/electioneering/?description=house&per_page=20&sort_null_only=false&sort_nulls_last=false&page=1&api_key=DEMO_KEY&sort_hide_null=false

SELECT ofec_electioneering_mv.cmte_id, ofec_electioneering_mv.cmte_nm, ofec_electioneering_mv.cand_id, ofec_electioneering_mv.cand_name, ofec_electioneering_mv.cand_office, ofec_electioneering_mv.cand_office_district, ofec_electioneering_mv.cand_office_st, ofec_electioneering_mv.f9_begin_image_num, ofec_electioneering_mv.calculated_cand_share, ofec_electioneering_mv.comm_dt, ofec_electioneering_mv.pub_distrib_dt, ofec_electioneering_mv.disb_dt, ofec_electioneering_mv.reported_disb_amt, ofec_electioneering_mv.disb_desc, ofec_electioneering_mv.rpt_yr, ofec_electioneering_mv.file_num, ofec_electioneering_mv.amndt_ind, ofec_electioneering_mv.receipt_dt, ofec_electioneering_mv.election_tp, ofec_electioneering_mv.payee_nm, ofec_electioneering_mv.payee_st, ofec_electioneering_mv.idx, ofec_electioneering_mv.sb_image_num, ofec_electioneering_mv.sub_id, ofec_electioneering_mv.link_id, ofec_electioneering_mv.sb_link_id, ofec_electioneering_mv.number_of_candidates, ofec_electioneering_mv.pdf_url, ofec_electioneering_mv.purpose_description_text 
FROM ofec_electioneering_mv 
WHERE ofec_electioneering_mv.purpose_description_text @@ to_tsquery('h:*') OR ofec_electioneering_mv.purpose_description_text @@ to_tsquery('o:*') OR ofec_electioneering_mv.purpose_description_text @@ to_tsquery('u:*') OR ofec_electioneering_mv.purpose_description_text @@ to_tsquery('s:*') OR ofec_electioneering_mv.purpose_description_text @@ to_tsquery('e:*')

Action item(s)

• Refactor api to have query look like ofec_electioneering_mv.purpose_description_text @@ to_tsquery('house:*')
• Add test case

Completion criteria

• Filter description works properly