SLING-5144 - Update local launchpad references to 8 or 9-SNAPSHOT

Switch a few more pom versions to 9-SNAPSHOT, to signal the release:

- main reactor pom
- launchpad/testing
- launchpad/testing-war

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1709017 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 21dac90..9f400e6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,7 +29,7 @@
 
     <artifactId>org.apache.sling.launchpad.testing-war</artifactId>
     <packaging>slingstart</packaging>
-    <version>7-SNAPSHOT</version>
+    <version>9-SNAPSHOT</version>
 
     <name>Apache Sling Launchpad Testing WAR version</name>
     <description>