Added support of regexp patterns for groups in deployment_tasks.yaml

[OpenStack Infra]

https://review.openstack.org/242133
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.

commit e434546d6854db879f5ffafc15405f8f8a01b113
Author: Alexander Rozdymakha <email address hidden>
Date: Thu Nov 5 18:01:01 2015 +0200

    Added support of regexp patterns for groups in deployment_tasks.yaml

    Regular expressions (perl format) should be used to specify wildcard.
    '/' used on the end of group name to distinguish regexp from simple string.

    groups: '/.*/' # any group
    groups: '/^(?!controller$)/' # all groups except controller
    groups: '/(?=controller)(?=^((?!^primary).)*$)/' # all controller,
            except primary-controller
    groups: '/mongo|compute/' # mongo or compute

    DocImpact
    Closes-Bug: #1480930

    Change-Id: I1f279fbd585775fc7b5af1ecbbaa24be21d831c9

[Alexander Adamov (aadamov)]

What information and where should be added?