GEODE-10533: Fix Deprecated APIs in geode-gfsh Module

Author: VENTSISLAV MARINOV

geode-gfsh/src/main/java/org/apache/geode/management/internal/cli/domain/RegionAttributesInfo.java

@@ -21,6 +21,7 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 
 import org.apache.commons.lang3.StringUtils;