Replace anonymous inner classes with lambdas, where applicable, in JNDI

Examples of some suitable candidates:

javax/naming/ldap/StartTlsRequest.java

    private final ClassLoader getContextClassLoader() {
        return AccessController.doPrivileged(
            new PrivilegedAction<ClassLoader>() {
                public ClassLoader run() {
                    return Thread.currentThread().getContextClassLoader();
                }
            }
        );
    }

    private final static boolean privilegedHasNext(final Iterator<StartTlsResponse> iter) {
        Boolean answer = AccessController.doPrivileged(
            new PrivilegedAction<Boolean>() {
            public Boolean run() {
                return Boolean.valueOf(iter.hasNext());
            }
        });
        return answer.booleanValue();
    }