Fix broken specs due to Solidus factory changes

Due to the following PR, the Country factory no longer always returns
true for `states_required`. It can be true for the appropriate countries
that require a state in shipping addresses. Because of this, addresses
using a country where `states_required` is true, such as the US, need
a state in the Spree::Address record to be valid.
solidusio/solidus#4272

spec/models/solidus_paypal_braintree/transaction_import_spec.rb

@@ -39,6 +39,10 @@
         )
       end
 
+      before do
+        create(:state, state_code: "WA")
+      end
+
       it { is_expected.to be false }
 
       it "sets useful error messages" do
@@ -115,7 +119,6 @@
     }
     let(:payment_method) { create_gateway }
 
-    let(:country) { create :country, iso: 'US', states_required: true }
     let(:transaction_address) { nil }
     let(:end_state) { 'confirm' }
 
@@ -132,7 +135,6 @@
 
     before do
       # create a shipping method so we can push through to the end
-      country
       create :shipping_method, cost: 5
 
       # ensure payments have the same number so VCR matches the request body

spec/models/solidus_paypal_braintree/transaction_spec.rb

@@ -28,6 +28,7 @@
 
     before do
       create(:country, iso: "US")
+      create(:state, state_code: "WA")
     end
 
     it { is_expected.to be true }