Apply feedback from decorator PR

Author: virkt25

test/unit/mixins/logger.mixin.test.ts

@@ -8,7 +8,7 @@ import {LoggerMixin, LogArgs, Logger} from '../../..';
 import {Application, Component} from '@loopback/core';
 import {Constructor} from '@loopback/context';
 
-describe('LoggerMixin', () => {
+describe('LoggerMixin (unit)', () => {
   it('mixed class has .logger()', () => {
     const myApp = new AppWithLogger();
     expect(typeof myApp.logger).to.be.eql('function');