feat：添加测试用例

添加了CPU使用率检查和内存使用率检查的测试用例

Author: ma2695212419

dongtai-agent/src/test/java/io/dongtai/iast/agent/fallback/checker/CpuUsageCheckerTest.java

@@ -1,6 +1,5 @@
 package io.dongtai.iast.agent.fallback.checker;
 
-import com.alibaba.fastjson2.JSONObject;
 import io.dongtai.iast.agent.IastProperties;
 import io.dongtai.iast.agent.fallback.checker.impl.CpuUsageChecker;
 import io.dongtai.iast.common.entity.performance.PerformanceMetrics;

dongtai-agent/src/test/java/io/dongtai/iast/agent/fallback/checker/MemUsageCheckerTest.java

@@ -1,8 +1,6 @@
 package io.dongtai.iast.agent.fallback.checker;
 
-import com.alibaba.fastjson2.JSONObject;
 import io.dongtai.iast.agent.IastProperties;
-import io.dongtai.iast.agent.fallback.FallbackConfig;
 import io.dongtai.iast.agent.fallback.checker.impl.MemUsageChecker;
 import io.dongtai.iast.common.entity.performance.PerformanceMetrics;
 import io.dongtai.iast.common.entity.performance.metrics.MemoryUsageMetrics;