Renamed test to reflect class under test
JAVA-1119: Added maxWriteBatchSize to ServerDescription and ServerStateNotifier, and applying it in MixedBulkWriteOperation
JAVA-1119: Off by one error
JAVA-1126: Fixed infinite loop in OrderedRunGenerator
JAVA-1102: DBRef classes are now serializable
Added maven plugin to build.gradle
Handle null values onResult of BaseWriteOperations
Checkstyle fix