fixes specs

spec/factories.rb

@@ -183,6 +183,7 @@ FactoryGirl.define do
   factory :spending_proposal do
     sequence(:title)     { |n| "Spending Proposal #{n} title" }
     description          'Spend money on this'
+    feasible_explanation 'This proposal is not viable because...'
     external_url         'http://external_documention.org'
     terms_of_service     '1'
     association :author, factory: :user

spec/models/spending_proposal_spec.rb

@@ -44,11 +44,13 @@ describe SpendingProposal do
 
   describe "#feasible_explanation" do
     it "should be valid if valuation not finished" do
+      spending_proposal.feasible_explanation = ""
       spending_proposal.valuation_finished = false
       expect(spending_proposal).to be_valid
     end
 
     it "should not be valid if valuation finished" do
+      spending_proposal.feasible_explanation = ""
       spending_proposal.valuation_finished = true
       expect(spending_proposal).to_not be_valid
     end