8017453: ReplayCache tests fail on multiple platforms

Reviewed-by: xuelei

test/sun/security/krb5/auto/ReplayCacheExpunge.java

@@ -41,6 +41,9 @@ public class ReplayCacheExpunge {
     static final Random rand = new Random();
 
     public static void main(String[] args) throws Exception {
+        // Make sure clockskew is default value
+        System.setProperty("java.security.krb5.conf", "nothing");
+
         int count = Integer.parseInt(args[0]);
         ReplayCache cache = ReplayCache.getInstance("dfl:./");
         AuthTimeWithHash a1 =

test/sun/security/krb5/auto/ReplayCacheTestProc.java

@@ -71,6 +71,12 @@ public class ReplayCacheTestProc {
             int mode = 0;   // native(1), random(0), java(-1)
             boolean random = true;      // random experiments choreograph
 
+            // Do not test interop with native GSS on some platforms
+            String os = System.getProperty("os.name", "???");
+            if (!os.startsWith("SunOS") && !os.startsWith("Linux")) {
+                mode = -1;
+            }
+
             try {
                 Class<?> clazz = Class.forName(
                         "com.sun.security.auth.module.UnixSystem");