fix(api7): use exact search to determine gateway group (#360)

Author: bzp2010

libs/backend-api7/src/index.ts

@@ -185,6 +185,7 @@ export class BackendAPI7 implements ADCSDK.Backend {
       {
         params: {
           search: this.gatewayGroupName,
+          name: this.gatewayGroupName,
         },
       },
     );