DATAMONGO-1176 - Cleanup.

- Update licenses headers.
- Renname variables and methods from dbo -> document.
- Remove deprecations.
- Remove unused code blocks.
- Upgrade to MongoDB Java Driver 3.3

spring-data-mongodb/pom.xml

@@ -18,7 +18,7 @@
 	<properties>
 		<objenesis>1.3</objenesis>
 		<equalsverifier>1.5</equalsverifier>
-		<mongo>3.2.2</mongo>
+		<mongo>3.3.0</mongo>
 	</properties>
 
 	<dependencies>