YARN-8918. [Submarine] Correct method usage of str.subString in CliUtils. (Zhankun Tang via wangda)

Change-Id: Id1f11dbab3aa838dee3a0ec8b8fd5dc32f5dd946
(cherry picked from commit 076b795b2e82d7f89cc91e0a8513c7081ee8b930)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-submarine/src/main/java/org/apache/hadoop/yarn/submarine/client/cli/CliUtils.java

@@ -72,7 +72,7 @@ public class CliUtils {
       resourcesStr = resourcesStr.substring(1);
     }
     if (resourcesStr.endsWith("]")) {
-      resourcesStr = resourcesStr.substring(0, resourcesStr.length());
+      resourcesStr = resourcesStr.substring(0, resourcesStr.length() - 1);
     }
 
     for (String resource : resourcesStr.trim().split(",")) {