Address review comments 2

Author: KostasTsiounis

closed/src/java.base/share/classes/openj9/internal/security/RestrictedSecurity.java

@@ -856,7 +856,7 @@ boolean isRestrictedServiceAllowed(Service service, boolean checkUse) {
 
                 // See if accepted uses have been specified and apply
                 // them to the call stack.
-                if (checkUse && !isNullOrBlank(cAcceptedUses)) {
+                if (checkUse && (cAcceptedUses != null)) {
                     String[] optionAndValue = cAcceptedUses.split(":");
                     String option = optionAndValue[0];
                     String value = optionAndValue[1];
@@ -895,6 +895,7 @@ boolean isRestrictedServiceAllowed(Service service, boolean checkUse) {
                             break;
                         default:
                             printStackTraceAndExit("Incorrect option to match in constraint: " + constraint);
+                            break;
                         }
 
                         if (found) {