1.6.0-qgov.1 Merge from upstream to support CKAN 2.11

What's Changed

• QOLDEV-1012 merge from upstream to add CKAN 2.11 support by @ThrawnCA in #8
• [QOLDEV-1012] add optional testing on latest CKAN master by @ThrawnCA in #9
• [QOLDEV-1075] pin test Solr versions to CKAN version by @ThrawnCA in #11
• Develop to master - merge from upstream by @ThrawnCA in #10

New Contributors

• @ThrawnCA made their first contribution in #8

Full Changelog: v1.4.2.a...1.6.0-qgov.1