RUBY-805 collection names operation and listCollections command
RUBY-805 filter collection names in the command
RUBY-805 Specs for listCollections and CollectionNames ops
RUBY-805 Use #first to get first doc in response
RUBY-805 Add documentation for ListCollections#wire_version
Merge pull request #530 from estolfo/RUBY-805-master-list-collections

RUBY-805 Use the listCollections command with server version 2.8