CI: exit codes and results of shell tasks are ignored in quickstart

[Sagi (Sergey) Shnaidman]

After we enabled adding timestamps in log files which was added by piped command, we lost status codes of first command in pipe:
command | awk ..add_timestamp_.. 2>&1 > command.log
awk
When "command" fails, the ansible shell task ignores it and consider result code of "awk" command only, because bash by default doesn't enable pipefail.

In bottom line: almost all failures in quickstart jobs will be ignored now and jobs will pass.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/450023

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/450023
Committed: https://git.openstack.org/cgit/openstack/tripleo-quickstart-extras/commit/?id=f791f5b3cdba607649b5f2cffda8ca177f5100ba
Submitter: Jenkins
Branch: master

commit f791f5b3cdba607649b5f2cffda8ca177f5100ba
Author: Sagi Shnaidman <email address hidden>
Date: Sun Mar 26 19:48:33 2017 +0300

    Add pipefail to each command that piped with timestamp

    When pipe is added to command, it should still exit with its
    result code, so save it by setting pipeline option before each
    command.

    Close-Bug: #1676156
    Change-Id: Ibbe49b4a15a5b7825447a563fe35af85fd48b3ff