Use versions-maven-plugin 2.3 to avoid NPE while setting project version

Change-Id: I5b9a00466090b22fec374fd7d71b80d745afed26

pom.xml

@@ -356,6 +356,11 @@
 					<artifactId>exec-maven-plugin</artifactId>
 					<version>1.4.0</version>
 				</plugin>
+				<plugin>
+					<groupId>org.codehaus.mojo</groupId>
+					<artifactId>versions-maven-plugin</artifactId>
+					<version>2.3</version>
+				</plugin>
 				<plugin>
 					<groupId>org.codehaus.mojo</groupId>
 					<artifactId>build-helper-maven-plugin</artifactId>