Use full text filter for aggregate resources

[lbeaufort]

Use fulltext filter for:
Schedule A: employer, occupation
Schedule B: purpose, and recipient name

Summary (required)

• Resolves Example 2: disbursements missing from /schedule_b/by_recipient/ #3429 : "Disbursements missing from /schedule_b/by_recipient/"

  Use full text filter for aggregate resources

  Use fulltext filter for:
  Schedule A: employer, occupation
  Schedule B: purpose, and recipient name

  This allows partial matches on these text fields.

How to test the changes locally

• http://localhost:5000/v1/schedules/schedule_b/by_recipient/?api_key=DEMO_KEY&cycle=2016&per_page=20&recipient_name=Starboard%20strategic&page=1 should return results for "STARBOARD STRATEGIC, INC."

Impacted areas of the application

List general components of the application that this PR will affect:

• /schedule_a/by_employer/ -> Can use partial text search for employer
• /schedule_a/by_occupation/ -> "" occupation
• /schedule_b/by_purpose/ -> "" purpose
• /schedule_b/by_recipient/ -> "" recipient

[codecov-io]

Codecov Report

Merging #3423 into develop will increase coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop    #3423      +/-   ##
===========================================
+ Coverage    88.47%   88.48%   +<.01%     
===========================================
  Files           76       76              
  Lines         6328     6332       +4     
===========================================
+ Hits          5599     5603       +4     
  Misses         729      729

Impacted Files	Coverage Δ
webservices/schemas.py	86.3% <ø> (ø)	⬆️
webservices/resources/aggregates.py	96.71% <100%> (+0.08%)	⬆️

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[pkfec]

Looks good.

[pkfec]

@qqss88 Can you merge this PR after you are done testing?

[lbeaufort]

@pkfec I don't think Charlie can merge PR's yet.