admin docs: interoperable image import revision

[Brian Rosmaita]

The admin docs need a revision about interoperable image import:

* remove mention of "experimental" API at the top

* wouldn't hurt to mention that web-download is the replacement for the old v1 copy-from and remind that v1 is DEPRECATED and will be removed in Rocky

* hit the TODO explaining the 2 different methods

* make sure it's clear where the configuration for each goes (what in glance-api.conf, what in glance-image-import.conf)

* make sure it's clear that glance-image-import.conf is an optional file and where the sample file can be found -- see Erno's comments on https://review.openstack.org/#/c/544596/3/doc/source/admin/interoperable-image-import.rst

And any typos, formatting problems you notice.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/545188

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/545188
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=90815cc7fb1e14f68c5df23d8ae0db418ee14982
Submitter: Zuul
Branch: master

commit 90815cc7fb1e14f68c5df23d8ae0db418ee14982
Author: Brian Rosmaita <email address hidden>
Date: Thu Feb 15 20:57:46 2018 -0500

    Revise interoperable image import documentation

    Updated to include the changes introduced in the Queens release.
    Closes-bug: #1749762

    Change-Id: I1df60db5826ff1e4491134f943d5eb0f29b0b072

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/queens
Review: https://review.openstack.org/545877

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/545877
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=33ca96abb304ea0c590f8ee6e300c86960f07155
Submitter: Zuul
Branch: stable/queens

commit 33ca96abb304ea0c590f8ee6e300c86960f07155
Author: Brian Rosmaita <email address hidden>
Date: Thu Feb 15 20:57:46 2018 -0500

    Revise interoperable image import documentation

    Updated to include the changes introduced in the Queens release.
    Closes-bug: #1749762

    Change-Id: I1df60db5826ff1e4491134f943d5eb0f29b0b072
    (cherry picked from commit 90815cc7fb1e14f68c5df23d8ae0db418ee14982)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/glance 16.0.0.0rc3 release candidate.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/glance 17.0.0.0b1 development milestone.