Use nokogiri provided by pdk for tests

Details in this pdk issue : https://github.com/puppetlabs/pdk/issues/535

changed title from Use nokogiri provided by pdk to Use nokogiri provided by pdk for tests

changed milestone to %1.3.0

created branch 34-use-nokogiri-provided-by-pdk-for-tests

mentioned in merge request !30 (merged)

mentioned in commit d075e86a

closed via commit d075e86a

closed via merge request !30 (merged)

mentioned in commit b0d3448d