JAVA-1395

Moved bulk write response from org.mongodb to com.mongodb.client.  This is not ideal since they are used in
com.mongodb.operation and com.mongodb.protocol packages; but the legacy versions
of these classes are already occupying the com.mongodb package, so they can't be moved there.

Shouldn't need the fully qualified class name here.  If you're getting an error with checkstyle not finding the class, you'll need the following in the build.gradle:

    tasks.withType(Checkstyle) {
        classpath = files(project(':driver-core').sourceSets.main.output, sourceSets.main.output);
    }

Shouldn't be necessary though since the class is in the same module.