Set parent dependency of ozgcloud-common to it's released version 4.0.0

pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>de.ozgcloud.common</groupId>
 		<artifactId>ozgcloud-common-parent</artifactId>
-		<version>4.0.0-SNAPSHOT</version>
+		<version>4.0.0</version>
 		<relativePath />
 	</parent>
 	<groupId>de.ozgcloud</groupId>