8244497: [TESTBUG] Incompatible types conversion error in vmTestbase/…

…vm/runtime/defmeth/StressTest.java after JDK-8243432

Reviewed-by: dholmes

test/hotspot/jtreg/vmTestbase/vm/runtime/defmeth/StressTest.java

@@ -55,7 +55,7 @@
     private StressOptions opts = new StressOptions();
 
     @Option(name="seed", default_value="0", description="force deterministic behavior")
-    private int seed;
+    private long seed;
 
     @Option(name="redefine", default_value="false", description="use scenarios w/ class redefinition")
     private boolean doRedefine;