Fix tests

Author: RubenBlazquez

spec/system/department_admin_should_be_able_to_manage_assemblies_spec.rb

@@ -43,7 +43,7 @@
           area_select = find("#assembly_area_id")
 
           expect(area_select).to be_present
-          expect(area_select[:disabled]).to be_falsey
+          expect(area_select[:disabled]).to eq("false")
         end
       end
     end

spec/system/department_admin_should_be_able_to_manage_processes_spec.rb

@@ -58,7 +58,7 @@
           area_select = find("#participatory_process_area_id")
 
           expect(area_select).to be_present
-          expect(area_select[:disabled]).to be_falsey
+          expect(area_select[:disabled]).to eq("false")
         end
       end
     end