Use awaitility version property.

Closes #4948

Author: mp911de

Diff for: spring-data-mongodb/pom.xml

@@ -135,7 +135,7 @@
 		<dependency>
 			<groupId>org.awaitility</groupId>
 			<artifactId>awaitility</artifactId>
-			<version>4.2.2</version>
+			<version>${awaitility}</version>
 			<scope>test</scope>
 		</dependency>