Backport rsyslog_client role to Juno from Kilo

[Bjoern]

Log rotate is not correctly configured on the host level in juno, leading to the situation that the /openstack/logs directory is never rotated. This on the other hand affects services inside the containers.
We can either backport the rsyslog_client role functionaility to Juno from Kilo to install the os_aggregate_storage logrotate configuration on all hosts or implement it in a other way.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: juno
Review: https://review.openstack.org/245920

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/245920
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible/commit/?id=b087695e5341bb11898491b055e0f423342fc1c1
Submitter: Jenkins
Branch: juno

commit b087695e5341bb11898491b055e0f423342fc1c1
Author: Bjoern Teipel <email address hidden>
Date: Mon Nov 16 11:35:05 2015 -0600

    Dropping logrotate.conf for all Openstack aggregate logs

    This fix will add a logrotate configuration file for each host
    including all log files found under /openstack/log.
    All log files are rotated using copytruncate, so no service needs to
    be restarted after the rotation.
    This was implemended to mimic the kilo implementation, hence using the same
    file name for the logrotate configuration, so it'll updated as part of the
    kilo upgrade.

    Change-Id: Ifb180bf5e1dd17c5ee3bdbfda54f7b469d1e4daf
    Closes-Bug: #1516697