Pin puppet-concat to the working hash
Pin puppet-concat to the working hash

A change in puppet-concat [1] has introduced
a bug [2], so until it's fixed, pin puppet-concat to
working hash.

[1] https://github.com/puppetlabs/puppetlabs-concat/commit/98d309c26daa4f71dcd397de8556ec0517631f16
[2] https://bugs.launchpad.net/tripleo/+bug/1745712

Change-Id: Ic1c2dfa094e3ca161e2ec169bcad76826b50554d

redhat-openstack/rdoinfo,javierpena/rdoinfo