Set Braintree log level as a gateway preference

app/models/solidus_paypal_braintree/gateway.rb

@@ -53,7 +53,7 @@ def gateway_options
         merchant_id: preferred_merchant_id,
         public_key: preferred_public_key,
         private_key: preferred_private_key,
-        logger: Braintree::Configuration.logger.clone
+        logger: logger
       }
     end
 
@@ -231,6 +231,12 @@ def reusable_sources(order)
 
     private
 
+    def logger
+      Braintree::Configuration.logger.clone.tap do |logger|
+        logger.level = Rails.logger.level
+      end
+    end
+
     def dollars(cents)
       Money.new(cents).dollars
     end