DATAMONGO-895, DATAMONGO-896 - Assert compatibility with latest MongoDB Java driver.

Upgrade next MongoDB driver version to 2.12.0. Strong upgrade coming in a subsequent commit to make sure we can backport the compatibility checks to the bugfix branch without forcing users into a driver upgrade.

Relaxing error message comparison in assertion so that it still matches against the message returned by MongoDB 2.6. When comparing the value of the version field, compare against a Long rather than an Integer, since the version field generated is a Long. This allows the test to pass against the upcoming 2.12.0 release of the Java driver, which has a stricter implementation of BasisDBObject.equals(…).

Original pull requests: #159, #160.

pom.xml

@@ -107,7 +107,7 @@
 		<profile>
 			<id>mongo-next</id>
 			<properties>
-				<mongo>2.12.0-rc0</mongo>
+				<mongo>2.12.0</mongo>
 				<mongo-osgi>2.12.0</mongo-osgi>
 			</properties>
 		</profile>

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/MongoTemplateUnitTests.java

@@ -229,7 +229,7 @@ public class MongoTemplateUnitTests extends MongoOperationsUnitTests {
 				org.mockito.Matchers.isNull(DBObject.class), org.mockito.Matchers.isNull(DBObject.class), eq(false),
 				captor.capture(), eq(false), eq(false));
 
-		Assert.assertThat(captor.getValue().get("$inc"), Is.<Object> is(new BasicDBObject("version", 1)));
+		Assert.assertThat(captor.getValue().get("$inc"), Is.<Object> is(new BasicDBObject("version", 1L)));
 	}
 
 	/**