Tests: relax KEK cache timing assertion to avoid flaky CI failures

Author: cconlon

src/test/java/com/wolfssl/provider/jce/test/WolfSSLKeyStoreTest.java

@@ -2547,10 +2547,10 @@ public void testKekCacheEnabledImprovePerformance() throws Exception {
             assertNotNull(key2);
             assertEquals(key1, key2);
 
-            /* Cache hit should be significantly faster */
+            /* Cache hit should be faster. */
             assertTrue("Cache hit should be faster: " +
                 "first=" + first + "ms, second=" + second + "ms",
-                first > 0 && (first > 50 ? second < first / 5 : true));
+                first > 0 && (first > 50 ? second < first : true));
 
         } finally {
             /* Restore original properties */