Snapshot "is_public" can not be updated in api-ref

[junboli]

In api-ref, when update a snapshot, we can only update its display_name and display_description, is_public can not be updated, Api-ref documented it in updating a share snapshot.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/493388

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/493388
Committed: https://git.openstack.org/cgit/openstack/manila/commit/?id=154db2926c10829361da98e7d2785deb51e0486b
Submitter: Jenkins
Branch: master

commit 154db2926c10829361da98e7d2785deb51e0486b
Author: junboli <email address hidden>
Date: Mon Aug 14 08:50:42 2017 +0800

    [Api-ref] remove "is_public" in snapshot updated description

    In api-ref/source/snapshot.inc, when update a snapshot, we can only update
    its "display_name" and "display_description", is_public can not be updated,
    So this change is to remove "is_public" in update snapshot description.

    Change-Id: I02109fc032df4bbf8ef487a567c7dd8d1d9c66ce
    Closes-bug: #1710523

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/manila 6.0.0.0b1 development milestone.