Add nachrichten-manager to dependency management

pom.xml

@@ -103,6 +103,11 @@
 				<artifactId>vorgang-manager-interface</artifactId>
 				<version>${vorgang-manager.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>de.ozgcloud.nachrichten</groupId>
+				<artifactId>nachrichten-manager-interface</artifactId>
+				<version>2.7.0-SNAPSHOT</version>
+			</dependency>
 			<dependency>
 				<groupId>de.ozgcloud.vorgang</groupId>
 				<artifactId>vorgang-manager-utils</artifactId>