8259451: Zero: skip serviceability/sa tests, set vm.hasSA to false

Reviewed-by: sgehwolf, cjplummer

Author: shipilev

test/lib/jdk/test/lib/Platform.java

@@ -226,6 +226,9 @@ public static boolean isRoot() {
      * on this platform.
      */
     public static boolean hasSA() {
+        if (isZero()) {
+            return false; // SA is not enabled.
+        }
         if (isAix()) {
             return false; // SA not implemented.
         } else if (isLinux()) {