RUBY-812 Add authmechanismproperties for GSSAPI
RUBY-812 Support authmechanismproperties in URI
RUBY-812 Remove empty extra hash in tests
RUBY-812 Use auth mechanism properties from spec
RUBY-812 Validate auth credentials including extra
RUBY-812 Add service_realm to username if provided
RUBY-812 formatting in test
Merge pull request #510 from estolfo/RUBY-812

RUBY-812 Support authmechanismproperties in URI