Shotgun cannot generate postgresql dump, or it runs postgres dump generation several times

[Evgeniy L]

1. deepcopy settings before we are changing them, otherwise if user clicks several times dump button then shotgun will run postgresql dump several times

https://github.com/stackforge/fuel-web/blob/6b5e2797dae6a3b803b3ac7102ae3d9164a013cf/nailgun/nailgun/task/task.py#L648

2. when we run command shotgun from mcollective plugin, we doesn't set home directory. As result this code

https://github.com/stackforge/fuel-web/blob/6b5e2797dae6a3b803b3ac7102ae3d9164a013cf/shotgun/shotgun/driver.py#L229-L240

doesn't work because it expands to //.pgpass , pg_dump command expects /root/.pgpass .

There are several ways to solve this problem, for now we can just hardcode this path.

[Openstack Gerrit (openstack-gerrit)]

Fix proposed to branch: master
Review: https://review.openstack.org/92601

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/92601
Committed: https://git.openstack.org/cgit/stackforge/fuel-web/commit/?id=2f7cf160ac96e745dcdce904ebbc507250304ce0
Submitter: Jenkins
Branch: master

commit 2f7cf160ac96e745dcdce904ebbc507250304ce0
Author: Alexander Kislitsky <email address hidden>
Date: Wed May 7 18:18:54 2014 +0400

    Shotgun PostgreSQL dump generation fixed

    Multiply writing dump_config into settings fixed.
    Path to .pgpass file fixed. Information from pwd used instead
    value of environment variable HOME

    Change-Id: Ib701a57fb6386d02cc93eb3d9f588f7abb1aac9f
    Closes-Bug: #1317018