Warnings building corba repo due to missing hashCode methods

The corba build emits a bunch of warnings that report missing hashCode methods, this should be examined.

/u/alanb/ws/jdk8/corba/src/share/classes/com/sun/corba/se/impl/orbutil/RepIdDelegator.java:41: warning: [overrides] Class RepIdDelegator overrides equals, but neither it nor any superclass overrides hashCode method
public final class RepIdDelegator
             ^
/u/alanb/ws/jdk8/corba/src/share/classes/com/sun/corba/se/impl/javax/rmi/CORBA/StubDelegateImpl.java:63: warning: [overrides] Class StubDelegateImpl overrides equals, but neither it nor any superclass overrides hashCode method
public class StubDelegateImpl implements javax.rmi.CORBA.StubDelegate
       ^
/u/alanb/ws/jdk8/corba/src/share/classes/com/sun/corba/se/impl/orb/ParserTable.java:451: warning: [overrides] Class ParserTable.TestBadServerIdHandler overrides equals, but neither it nor any superclass overrides hashCode method
    public final class TestBadServerIdHandler implements BadServerIdHandler
                 ^
/u/alanb/ws/jdk8/corba/src/share/classes/com/sun/corba/se/impl/orb/ParserTable.java:513: warning: [overrides] Class TestLegacyORBSocketFactory overrides equals, but neither it nor any superclass overrides hashCode method
    public static final class TestLegacyORBSocketFactory
                        ^
/u/alanb/ws/jdk8/corba/src/share/classes/com/sun/corba/se/impl/orb/ParserTable.java:538: warning: [overrides] Class TestORBSocketFactory overrides equals, but neither it nor any superclass overrides hashCode method
    public static final class TestORBSocketFactory
                        ^
/u/alanb/ws/jdk8/corba/src/share/classes/com/sun/corba/se/impl/orb/ParserTable.java:567: warning: [overrides] Class TestIORToSocketInfo overrides equals, but neither it nor any superclass overrides hashCode method
    public static final class TestIORToSocketInfo
                        ^
/u/alanb/ws/jdk8/corba/src/share/classes/com/sun/corba/se/impl/orb/ParserTable.java:603: warning: [overrides] Class TestContactInfoListFactory overrides equals, but neither it nor any superclass overrides hashCode method
    public static final class TestContactInfoListFactory
                        ^
/u/alanb/ws/jdk8/corba/src/share/classes/com/sun/corba/se/impl/orb/ParserTable.java:860: warning: [overrides] Class TestORBInitializer1 overrides equals, but neither it nor any superclass overrides hashCode method
    public static final class TestORBInitializer1 extends org.omg.CORBA.LocalObject
                        ^
/u/alanb/ws/jdk8/corba/src/share/classes/com/sun/corba/se/impl/orb/ParserTable.java:877: warning: [overrides] Class TestORBInitializer2 overrides equals, but neither it nor any superclass overrides hashCode method
    public static final class TestORBInitializer2 extends org.omg.CORBA.LocalObject
                        ^
/u/alanb/ws/jdk8/corba/src/share/classes/com/sun/corba/se/impl/orb/ParserTable.java:946: warning: [overrides] Class TestAcceptor1 overrides equals, but neither it nor any superclass overrides hashCode method
    public static final class TestAcceptor1
                        ^
/u/alanb/ws/jdk8/corba/src/share/classes/com/sun/corba/se/impl/orb/ParserTable.java:977: warning: [overrides] Class TestAcceptor2 overrides equals, but neither it nor any superclass overrides hashCode method
    public static final class TestAcceptor2
                        ^
/u/alanb/ws/jdk8/corba/src/share/classes/sun/rmi/rmic/iiop/CompoundType.java:1779: warning: [overrides] Class CompoundType.Method overrides equals, but neither it nor any superclass overrides hashCode method
    public class Method implements ContextElement, Cloneable {
           ^
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.