ci breaks on rainbow gem

[Michele Baldessari]

All puppet CI jobs are broken after the upgrade to bionic. For example:
http://logs.openstack.org/92/620892/2/check/puppet-openstack-lint/95d9076/job-output.txt.gz#_2018-11-29_15_05_37_005160

2018-11-29 15:09:59.606042 | ubuntu-bionic | current directory:
2018-11-29 15:09:59.606240 | ubuntu-bionic | /home/zuul/workspace/openstack-pacemaker/.bundled_gems/gems/rainbow-2.2.2/ext
2018-11-29 15:09:59.606343 | ubuntu-bionic | /usr/bin/ruby2.5 mkrf_conf.rb
2018-11-29 15:09:59.606385 | ubuntu-bionic |
2018-11-29 15:09:59.606534 | ubuntu-bionic | current directory:
2018-11-29 15:09:59.606765 | ubuntu-bionic | /home/zuul/workspace/openstack-pacemaker/.bundled_gems/gems/rainbow-2.2.2/ext
2018-11-29 15:09:59.606866 | ubuntu-bionic | /usr/bin/ruby2.5 -rrubygems
2018-11-29 15:09:59.607031 | ubuntu-bionic | /usr/share/rubygems-integration/all/gems/rake-12.3.1/exe/rake
2018-11-29 15:09:59.607300 | ubuntu-bionic | RUBYARCHDIR=/home/zuul/workspace/openstack-pacemaker/.bundled_gems/extensions/x86_64-linux/2.5.0/rainbow-2.2.2
2018-11-29 15:09:59.607568 | ubuntu-bionic | RUBYLIBDIR=/home/zuul/workspace/openstack-pacemaker/.bundled_gems/extensions/x86_64-linux/2.5.0/rainbow-2.2.2
2018-11-29 15:09:59.607706 | ubuntu-bionic | /usr/bin/ruby2.5: No such file or directory --
2018-11-29 15:09:59.607899 | ubuntu-bionic | /usr/share/rubygems-integration/all/gems/rake-12.3.1/exe/rake (LoadError)
2018-11-29 15:09:59.607942 | ubuntu-bionic |
2018-11-29 15:09:59.608098 | ubuntu-bionic | rake failed, exit code 1

I can reproduce this inside an ubuntu 18.04 container and I can fix it by simply doing a:
export rake="/usr/bin/rake"

Also see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=895946

Not yet sure what the proper fix is in the openstack CI context

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/620955

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/619892
Committed: https://git.openstack.org/cgit/openstack/puppet-pacemaker/commit/?id=5800e93e176c5c4365f933b5883e7bf2db7a5ac5
Submitter: Zuul
Branch: master

commit 5800e93e176c5c4365f933b5883e7bf2db7a5ac5
Author: Tobias Urdin <email address hidden>
Date: Sat Nov 24 15:39:13 2018 +0100

    Remove unneeded spec testing file

    Also fix up a couple of failing tests in the pacemaker::new module
    and remove one very artificial test that is not working on puppet 4 any
    longer (NB: the pacemaker;:new module has been fundamentally unmaintained
    for years now, this is mainly to keep CI running)

    Closes-Bug: #1805868
    Change-Id: I4102b204f303b0ada697f0ad9d9a24279473e046

[OpenStack Infra (hudson-openstack)]

Change abandoned by Michele Baldessari (<email address hidden>) on branch: master
Review: https://review.openstack.org/620955

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/puppet-pacemaker 0.7.2 release.