Fix signed in employee adding supplier functionality

spec/acceptance_steps/suppliers/signup_steps.rb

@@ -16,6 +16,10 @@ step "fill in the supplier signup form with existing employee credentials" do
   js_set_field '#new_supplier_password_confirmation', @employee_password
 end
 
+step "fill in the supplier signup form with a new supplier name" do
+  js_set_field '#new_supplier_supplier_name', 'Signup Supplier'
+end
+
 step "click on the supplier signup submit button" do
   find('[name="commit"]').click
 end