[Task-Based] the plugins pre/post tasks are not running in deployment

[Bulat Gaifullin]

The plugin pre/post deployment task is not included to deployment graph.
This causes because this kind of tasks is not linked to deployment tasks graph and was handled as hook.

Need to include this tasks as next:
all pre task shall be run between pre_deployment_end and deploy_start stages.
all post deployment tasks shall be run after post_deployment_end.

the pre/post task shall run step by step according to its priorities.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/259117

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/259818

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/259117
Committed: https://git.openstack.org/cgit/openstack/fuel-web/commit/?id=56c811cedd896395c604fc665f60e2de8b380100
Submitter: Jenkins
Branch: master

commit 56c811cedd896395c604fc665f60e2de8b380100
Author: Bulat Gaifullin <email address hidden>
Date: Wed Dec 16 15:15:37 2015 +0300

    Added the pre/post tasks from plugins to list of deployment task

    - The plugin deployment tasks are proceeded with the core-tasks.
    - The plugin pre-deployment tasks will be added as
        chain between pre_deployment_end and deploy_start.
    - The plugin post-deployment tasks will be added as
        chain after post_deployment_end.

    Closes-Bug: #1527325
    Change-Id: I5b416d9507b2ae1503c356a9828a0b7be85c1eb1

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/259818
Committed: https://git.openstack.org/cgit/openstack/fuel-plugins/commit/?id=4ca6c5950ee6ae8dd15fece298feba5431d102e1
Submitter: Jenkins
Branch: master

commit 4ca6c5950ee6ae8dd15fece298feba5431d102e1
Author: Ilya Kutukov <email address hidden>
Date: Mon Dec 21 03:26:58 2015 +0300

    Added pre-post tasks validation to plugins builder

    - The plugin deployment tasks now could contain
      cross-depends and cross-depended-by properties
      inroduced by task based deploment feature.

    Change-Id: Icb351e4475ba6e78e7c8ef22cefc255116d44ba8
    Related-Bug: #1527325