using SNAPSHOT version of launchpad plugin to see repository.xml context support

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@988643 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index f4d8ae3..6fca2bf 100644
--- a/pom.xml
+++ b/pom.xml
@@ -151,6 +151,7 @@
             <plugin>
                 <groupId>org.apache.sling</groupId>
                 <artifactId>maven-launchpad-plugin</artifactId>
+                <version>2.0.7-SNAPSHOT</version>
                 <executions>
                     <execution>
                         <id>prepare-package</id>