Apply hint, min, and max to explainable find operation

As part of the changes in DBCursor for JAVA-3022, hint, min, and max
are set as individual properties on FindOperation rather than via
modifiers. However, FindOperation was not correctly applying them to
a $explain query in pre-3.2 MongoDB servers.  Now it is.

JAVA-3022

Author: jyemin

driver-core/src/main/com/mongodb/operation/FindOperation.java

@@ -61,6 +61,7 @@
 import static com.mongodb.assertions.Assertions.notNull;
 import static com.mongodb.connection.ServerType.SHARD_ROUTER;
 import static com.mongodb.internal.async.ErrorHandlingResultCallback.errorHandlingCallback;
+import static com.mongodb.internal.operation.ServerVersionHelper.serverIsAtLeastVersionThreeDotTwo;
 import static com.mongodb.operation.CommandOperationHelper.CommandTransformer;
 import static com.mongodb.operation.CommandOperationHelper.executeWrappedCommandProtocol;
 import static com.mongodb.operation.CommandOperationHelper.executeWrappedCommandProtocolAsync;
@@ -69,7 +70,6 @@
 import static com.mongodb.operation.OperationHelper.LOGGER;
 import static com.mongodb.operation.OperationHelper.cursorDocumentToQueryResult;
 import static com.mongodb.operation.OperationHelper.releasingCallback;
-import static com.mongodb.internal.operation.ServerVersionHelper.serverIsAtLeastVersionThreeDotTwo;
 import static com.mongodb.operation.OperationHelper.validateReadConcernAndCollation;
 import static com.mongodb.operation.OperationHelper.withConnection;
 import static com.mongodb.operation.OperationReadConcernHelper.appendReadConcernToCommand;
@@ -911,6 +911,9 @@ private FindOperation<BsonDocument> createExplainableQueryOperation() {
                .sort(sort)
                .skip(skip)
                .limit(Math.abs(limit) * -1)
+               .hint(hint)
+               .min(min)
+               .max(max)
                .modifiers(explainModifiers);
 
     }

driver-core/src/test/functional/com/mongodb/operation/FindOperationSpecification.groovy

@@ -636,6 +636,9 @@ class FindOperationSpecification extends OperationFunctionalSpecification {
                 .projection(new BsonDocument('x', new BsonInt32(1)))
                 .sort(new BsonDocument('y', new BsonInt32(-1)))
                 .filter(new BsonDocument('z', new BsonString('val')))
+                .hint(new BsonDocument('a', new BsonInt32(1)))
+                .min(new BsonDocument('min', new BsonInt32(1)))
+                .max(new BsonDocument('max', new BsonInt32(1)))
         def binding = Stub(ReadBinding)
         def source = Stub(ConnectionSource)
         def connection = Mock(Connection)
@@ -652,7 +655,10 @@ class FindOperationSpecification extends OperationFunctionalSpecification {
                 new ServerVersion(2, 6), STANDALONE, 1000, 100000, 100000, [])
 
         1 * connection.query(getNamespace(), new BsonDocument('$query', operation.filter)
-                .append('$explain', BsonBoolean.TRUE).append('$orderby', operation.sort),
+                .append('$explain', BsonBoolean.TRUE).append('$orderby', operation.sort)
+                .append('$hint', operation.hint)
+                .append('$min', operation.min)
+                .append('$max', operation.max),
                 operation.projection, 0, -20, 0, false, false, false, false, false, false, _) >>
                 new QueryResult(getNamespace(), [new BsonDocument('n', new BsonInt32(1))], 0, new ServerAddress())