6706299: System property java.class.version should be 51 for jdk7

Summary: System property java.class.version should be 51 for jdk7
Reviewed-by: alanb

src/share/native/java/lang/System.c

@@ -84,7 +84,7 @@ Java_java_lang_System_identityHashCode(JNIEnv *env, jobject this, jobject x)
 #define VENDOR_URL_BUG "http://java.sun.com/cgi-bin/bugreport.cgi"
 #endif
 
-#define JAVA_MAX_SUPPORTED_VERSION 50
+#define JAVA_MAX_SUPPORTED_VERSION 51
 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
 
 JNIEXPORT jobject JNICALL

test/java/lang/System/Versions.java

@@ -23,7 +23,7 @@
 
 /**
  * @test
- * @bug 4989690 6259855
+ * @bug 4989690 6259855 6706299
  * @summary Check that version-related system property invariants hold.
  * @author Martin Buchholz
  */