Fix fuel deployment-task help message

[Alexander Kurenyshev]

Steps to reproduce:
I need to get info about some tasks on the node with specific id. I don't remember exactly command and use help. Use examples section to make a request:

[root@nailgun ~]# fuel deployment-tasks --task-id 17 -h| grep "\-\-nodes"
            fuel deployment-tasks --task-id 5 --nodes 1,2
            fuel deployment-tasks --task-id 5 --status error --nodes 1,2

Now I know that I should use --nodes argument for my query:
[root@nailgun ~]# fuel deployment-tasks --task-id 17 --nodes 1
<...>
fuel: error: unrecognized arguments: --nodes 1

At the `optional arguments:` section command is correct:
--node NODE, --node-id NODE
                        Node ids.

We should fix the Examples section

[root@nailgun ~]# shotgun2 short-report
cat /etc/fuel_build_id:
 490
cat /etc/fuel_build_number:
 490
cat /etc/fuel_release:
 9.0
cat /etc/fuel_openstack_version:
 mitaka-9.0
rpm -qa | egrep 'fuel|astute|network-checker|nailgun|packetary|shotgun':
 fuel-release-9.0.0-1.mos6349.noarch
 fuel-misc-9.0.0-1.mos8460.noarch
 python-packetary-9.0.0-1.mos140.noarch
 fuel-bootstrap-cli-9.0.0-1.mos285.noarch
 fuel-migrate-9.0.0-1.mos8460.noarch
 rubygem-astute-9.0.0-1.mos750.noarch
 fuel-mirror-9.0.0-1.mos140.noarch
 shotgun-9.0.0-1.mos90.noarch
 fuel-openstack-metadata-9.0.0-1.mos8743.noarch
 fuel-notify-9.0.0-1.mos8460.noarch
 nailgun-mcagents-9.0.0-1.mos750.noarch
 python-fuelclient-9.0.0-1.mos325.noarch
 fuel-9.0.0-1.mos6349.noarch
 fuel-utils-9.0.0-1.mos8460.noarch
 fuel-setup-9.0.0-1.mos6349.noarch
 fuel-provisioning-scripts-9.0.0-1.mos8743.noarch
 fuel-library9.0-9.0.0-1.mos8460.noarch
 network-checker-9.0.0-1.mos74.x86_64
 fuel-agent-9.0.0-1.mos285.noarch
 fuel-ui-9.0.0-1.mos2717.noarch
 fuel-ostf-9.0.0-1.mos936.noarch
 fuelmenu-9.0.0-1.mos274.noarch
 fuel-nailgun-9.0.0-1.mos8743.noarch

[Bug Checker Bot (bug-checker)]

(This check performed automatically)
Please, make sure that bug description contains the following sections filled in with the appropriate data related to the bug you are describing:

actual result

expected result

For more detailed information on the contents of each of the listed sections see https://wiki.openstack.org/wiki/Fuel/How_to_contribute#Here_is_how_you_file_a_bug

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/332064

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/332064
Committed: https://git.openstack.org/cgit/openstack/python-fuelclient/commit/?id=6e9e904c4e9f6d9c43832a13025d6fda973a0689
Submitter: Jenkins
Branch: master

commit 6e9e904c4e9f6d9c43832a13025d6fda973a0689
Author: Oleksandr Berezovskyi <email address hidden>
Date: Tue Jun 21 13:23:27 2016 +0300

    Fix fuel deployment-task help message

    Change-Id: I972a87ec3c0851d40bbdc6e1221bdc8590558725
    Closes-Bug: #1594463