RUBY-801 Fix read preference module to conform to spec regarding tags and nearest
RUBY-801 read preference tests to make sure spec is respected
RUBY-801 Add more tests and an explanation to each
additional tests progress
RUBY-801 Adding tests
RUBY-801 Adjust test latencies
Merge pull request #512 from estolfo/RUBY-801-read-pref

Ruby 801 Make read preference with mode nearest and tag sets conform to spec