DATAMONGO-305 - Removed synchronization from Query class.

As Query is not intended to be thread-safe at all, we can safely remove the synchronized blocks from sort() and fields().

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/query/Query.java

@@ -63,10 +63,8 @@ public class Query {
 	}
 
 	public Field fields() {
-		synchronized (this) {
-			if (fieldSpec == null) {
-				this.fieldSpec = new Field();
-			}
+		if (fieldSpec == null) {
+			this.fieldSpec = new Field();
 		}
 		return this.fieldSpec;
 	}
@@ -82,11 +80,10 @@ public class Query {
 	}
 
 	public Sort sort() {
-		synchronized (this) {
-			if (this.sort == null) {
-				this.sort = new Sort();
-			}
+		if (this.sort == null) {
+			this.sort = new Sort();
 		}
+	
 		return this.sort;
 	}