8151225: Mark SpecTest.java as intermittently failing

Reviewed-by: mullan

test/sun/security/rsa/SpecTest.java

 /*
- * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -34,6 +34,7 @@ import java.security.spec.RSAKeyGenParameterSpec;
 /**
  * @test
  * @bug 8044199
+ * @key intermittent
  * @summary Check same KeyPair's private key and public key have same modulus.
  *  also check public key's public exponent equals to given spec's public
  *  exponent.