Force all campaigns that start after June 1st to use new pricing

[hopsoft]

Type of PR

• [ ] feature
• [ ] enhancement
• [ ] bug fix
• [x] other

Description

Force all camapigns with a start date on or after June 1st, 2020 to use the new pricing model.

Checklist

• [x] My code follows the style guidelines of this project & the tests are passing
• [x] I have performed a self-review of my own code
• [x] I have requested a review from another developer(s)

[codecov[bot]]

Codecov Report

Merging #1331 into master will increase coverage by 0.02%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1331      +/-   ##
==========================================
+ Coverage   34.98%   35.00%   +0.02%     
==========================================
  Files         352      352              
  Lines        8113     8114       +1     
==========================================
+ Hits         2838     2840       +2     
+ Misses       5275     5274       -1     

Impacted Files	Coverage Δ
app/models/campaign.rb	79.22% <100.00%> (+0.06%)	:arrow_up:
app/jobs/schedule_organization_report_job.rb	86.20% <0.00%> (ø)
app/models/region.rb	62.90% <0.00%> (+1.61%)	:arrow_up: