docs builds failing on CI

[Jamie Lennox]

The docs builds for all requests-mock reviews are failing with the message[1]:

...
2016-09-27 22:12:43.618556 | + echo ======================================================================
2016-09-27 22:12:43.618617 | ======================================================================
2016-09-27 22:12:43.618649 | + MARKER_TEXT='Project: openstack/requests-mock Ref: Build: d62b0faab6ea4bd19c06c6637376eea1'
2016-09-27 22:12:43.618675 | + echo Project: openstack/requests-mock Ref: Build: d62b0faab6ea4bd19c06c6637376eea1
2016-09-27 22:12:43.618706 | /usr/local/jenkins/slave_scripts/run-docs.sh: line 31: doc/build/html/.root-marker: No such file or directory
2016-09-27 22:12:43.619080 | [Zuul] Task exit code: 1
2016-09-27 22:12:45.134780 | [Zuul] Job complete, result: FAILURE

This marker text was added by [2] and seems to presume a specific layout of documentation.

[1] http://logs.openstack.org/57/376057/1/check/gate-requests-mock-docs-ubuntu-xenial/d62b0fa/console.html
[2] https://review.openstack.org/#/c/369660/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/381409

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/381409
Committed: https://git.openstack.org/cgit/openstack/requests-mock/commit/?id=9fbd45b35fa9111f8409556eb65b9ee664d2b58c
Submitter: Jenkins
Branch: master

commit 9fbd45b35fa9111f8409556eb65b9ee664d2b58c
Author: Jamie Lennox <email address hidden>
Date: Tue Oct 4 16:30:44 2016 +1100

    Fix docs building

    As part of review [1] the openstack build system assumes the layout of
    the docs directories to be doc/build. This is not what requests-mock was
    producing. Fix the docs building directories to make it work with the
    build system again.

    [1] Icb0c02dc5b6f7b5e248e0df6d6093c29535b08f3

    Closes-Bug: #1630114
    Change-Id: Iea93ecfb0506d5ccd0b79ad35f5677797fadf730