Fix Beaker CI according recent puppetlabs-rabbitmq change.
Fix Beaker CI according recent puppetlabs-rabbitmq change.

The puppetlabs-rabbitmq module introduce a new feature related to the
erlang_cookie parameter change (the database must be wiped if the cookie is
changed), the parameter wipe_db_on_cookie_change is configured to false by
default.

But we're not setting up a rabbitmq cluster and we're not using pacemaker in
beaker CI tests, so we just remove the erlang cookie parameter change.

Change-Id: I1ba95a680a70524e4fe7fb07449163b690149aa8
Closes-Bug: #1468444

NeCTAR-RC/puppet-neutron,openstack/puppet-neutron,NeCTAR-RC/puppet-neutron,plumgrid/puppet-neutron,IPnett/puppet-neutron,plumgrid/puppet-neutron,redhat-cip/puppet-neutron,rdo-puppet-modules/puppet-neutron,redhat-cip/puppet-neutron,CiscoSystems/puppet-neutron,CiscoSystems/puppet-neutron,redhat-cip/puppet-neutron,IPnett/puppet-neutron,NeCTAR-RC/puppet-neutron,fuel-infra/puppet-neutron,fuel-infra/puppet-neutron,IPnett/puppet-neutron,fuel-infra/puppet-neutron,rdo-puppet-modules/puppet-neutron,openstack/puppet-neutron,CiscoSystems/puppet-neutron