changing version to 2.3.1

Author: Sarmokadam

pom.xml

@@ -11,7 +11,7 @@
 
   <properties>
     <oasp4j.version>2.5.0</oasp4j.version>
-    <devonfw.version>2.3.0</devonfw.version>
+    <devonfw.version>2.3.1</devonfw.version>
     <spring.boot.version>1.5.3.RELEASE</spring.boot.version>
     <java.version>1.7</java.version>
     <oasp.port.range>81</oasp.port.range>