[type:improve] Refine code according to code specifications

[po-168]

Refine code according to code specifications: Change the scope to shenyu-admin to use objects.equals to determine whether Objects are equal

Make sure that:

• [ ] You have read the contribution guidelines.
• [ ] You submit test cases (unit or integration tests) that back your changes.
• [ ] Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[moremind]

I think the change is graceful

[po-168]

What about this kind of code? @moremind

[moremind]

What about this kind of code? @moremind

you can change the magic to constant value. but the comparation may not chagne.