[maven-release-plugin] prepare for next development iteration

Author: Robert Hennig

pom.xml

@@ -11,7 +11,7 @@
   <groupId>com.paymill</groupId>
   <artifactId>paymill-java</artifactId>
   <packaging>jar</packaging>
-  <version>5.1.6</version>
+  <version>5.1.7-SNAPSHOT</version>
 
   <name>paymill-java</name>
   <url>http://www.paymill.com</url>