Scope needs to be replaced with entityId (#2742)

"scope" can not find in serviceInventoryCache, serviceInstanceInventoryCache or endpointInventoryCache.
It needs to be replaced with entityId

oap-server/exporter/src/main/java/org/apache/skywalking/oap/server/exporter/provider/MetricFormatter.java

@@ -35,11 +35,14 @@ public class MetricFormatter {
     protected String getEntityName(MetricsMetaInfo meta) {
         int scope = meta.getScope();
         if (DefaultScopeDefine.inServiceCatalog(scope)) {
-            return serviceInventoryCache.get(scope).getName();
+            int entityId = Integer.valueOf(meta.getId());
+            return serviceInventoryCache.get(entityId).getName();
         } else if (DefaultScopeDefine.inServiceInstanceCatalog(scope)) {
-            return serviceInstanceInventoryCache.get(scope).getName();
+            int entityId = Integer.valueOf(meta.getId());
+            return serviceInstanceInventoryCache.get(entityId).getName();
         } else if (DefaultScopeDefine.inEndpointCatalog(scope)) {
-            return endpointInventoryCache.get(scope).getName();
+            int entityId = Integer.valueOf(meta.getId());
+            return endpointInventoryCache.get(entityId).getName();
         } else if (scope == DefaultScopeDefine.ALL) {
             return "";
         } else {