IPv6 mode should not be specified in API when ip version is 4

[Xu Han Peng]

Need to add a validation to ipv6_ra_mode and ipv6_address_mode with ip version. An InvalidInput error should be prompted when ipv6_ra_mode or ipv6_address_mode is specified in API and ip version is 4.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/87435

[Openstack Gerrit (openstack-gerrit)]

Reviewed: https://review.openstack.org/87435
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=239d0378a23a64ea1d374becc4724ab1603157dc
Submitter: Jenkins
Branch: master

commit 239d0378a23a64ea1d374becc4724ab1603157dc
Author: Xuhan Peng <email address hidden>
Date: Tue Apr 15 11:12:16 2014 +0800

    Validate IPv6 modes in API when IP version is 4

    Add a validation to ipv6_ra_mode and ipv6_address_mode with ip
    version. An InvalidInput error is prompted when ipv6_ra_mode
    or ipv6_address_mode is specified in subnet create and update
    API and ip version is 4.

    Change-Id: I9a0356f23e6b162c31f2d289a34f4bd261cee91e
    Closes-Bug: 1307788