Remove package ruby21-rubygem-popen4 from repository

[Vladimir Sharshov]

According to bug https://bugs.launchpad.net/fuel/+bug/1518325 we do not need ruby21-rubygem-popen4 package in our repositories anymore.

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/248619

[Sergey Kulanov (skulanov)]

We can remove package after successful BVT pass

[Vitaly Parakhin (vparakhin)]

BVT is OK: http://jenkins-product.srt.mirantis.net:8080/job/8.0.custom.ubuntu.bvt_2/292/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/248619
Committed: https://git.openstack.org/cgit/openstack/fuel-main/commit/?id=e4634dce5b706361c0d2dc7ed436bdd7ede50577
Submitter: Jenkins
Branch: master

commit e4634dce5b706361c0d2dc7ed436bdd7ede50577
Author: Vladimir Sharshov (warpc) <email address hidden>
Date: Mon Nov 23 14:07:39 2015 +0300

    Remove unused popen4 package gem

    Astute now use standard open3 gem instead of popen4 gem

    Change-Id: I97e0dbaa3f09371032703522163cc715277eecd0
    Related-Bug: #1518325
    Related-Bug: #1518926

[Vladimir Sharshov (vsharshov)]

Changes merged. As i can see we can remove this package from repository safely now.