Fix RSpec 3.x syntax
Fix RSpec 3.x syntax

* 10 conversions
    from: it { should ... }
      to: it { is_expected.to ... }

Change-Id: Ife3d272d9ae05b724be630c355dfe29ec29cd052
Signed-off-by: Gael Chamoulaud <68646863a1a9108d0246eb96cb6356f9fa9a34f3@redhat.com>

openstack/puppet-ironic,fuel-infra/puppet-ironic,rdo-puppet-modules/puppet-ironic,fuel-infra/puppet-ironic,openstack/puppet-ironic,trown/puppet-ironic,trown/puppet-ironic,fuel-infra/puppet-ironic,openstack/puppet-ironic,trown/puppet-ironic,rdo-puppet-modules/puppet-ironic