Add integration test with OpenLDAP to Travis matrix
Add INTEGRATION flag constant
Add OpenLDAP installer, seed/config fixtures
Add basic integration tests for bind
Fix test class name
No email notifications for CI builds
Show operation result for failed binds
Inspect the operation result struct for details
Bind with full DN
Expect anonymous auth to fail
Merge branch 'master' into ci-openldap
Override Test::Unit::TestCase#run for disabled integration tests
Move bind integration test under test/integration/

Use an abstract integration test case.
Relative path has changed
Add basic search integration tests
Testing return_result: false
Allow integration host override
Add Vagrant VM for local integration testing
No need to run CI without integration tests
Link to Vagrant, clarify installing vagrant binary