Fix missing assume yes answer in spec_helper_acceptance.rb

Missing flag --yes.

https://gitlab.adullact.net/adullact/puppet-wordpress/blob/master/spec/spec_helper_acceptance.rb#L27

created branch 30-fix-missing-assume-yes-answer-in-spec_helper_acceptance-rb

mentioned in merge request !26 (merged)

mentioned in commit 90de290f

closed via commit 90de290f

closed via merge request !26 (merged)

closed via commit 3d206aed