SOLR-6899: Make CollectionAdminRequest.action setter protected instead of public

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1648451 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6779 (fix /browse on schemaless example) and several other related fixes and cleanups including remove /browse from test configs where it isn't needed, adjusting /browse definition to be valid and not an inappropriate copy of techproducts, fixed /update/extract indexing with data_driven_schema_configs configset, and fixed indexing of solr(-to-solr) example DIH indexing

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1648456 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6779: adjust trunk CHANGES to reflect the merge to 5x

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1648463 13f79535-47bb-0310-9956-ffa450edef68
Update logo/style in generic templates (already fixed for techproducts)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1648467 13f79535-47bb-0310-9956-ffa450edef68
SOLR-6435: bin/post cleanup for 5x merge

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1648478 13f79535-47bb-0310-9956-ffa450edef68