[System Tests] Increase timeout for provisioning in CLI tests

[Alexander Kurenyshev]

Test cli_selected_nodes_deploy failed with timeout while provisioning controller node.

1. Create a cluster using Fuel CLI
2. Provision a controller node using Fuel CLI

Task `fuel --env-id={0} node --provision --node={1} --json` failed with timeout. 20 minutes is not enough for it.
Increasing timeout to 30 minutes solved problem at my local environment.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/206666
Committed: https://git.openstack.org/cgit/stackforge/fuel-qa/commit/?id=303641841b6f728f72e77472bba83fa2cddd6510
Submitter: Jenkins
Branch: master

commit 303641841b6f728f72e77472bba83fa2cddd6510
Author: Alexander Kurenyshev <email address hidden>
Date: Tue Jul 28 22:34:23 2015 +0300

    Add SSL support to the Fuel-QA tests

    This patch implements ability to system
    tests work with new SSL feature.
    Writed new module SSL includes functions
    for certificates generating and changing
    SSL cluster configuration.
    Also add fix to the cli test, because
    this test uses different way to deploy
    cluster and if so different way to
    enable/disable SSL.

    Change-Id: I857ed750f6f2bd0edfbe4f3bda3f8fbe5faede99
    Closes-Bug: 1482216
    Closes-Bug: 1486511
    Closes-Bug: 1488097