Update Gerrit version to 2.9-SNAPSHOT

Change-Id: Ie7ab492d9570d01ca3e897e7d6da31f471d23420
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

pom.xml

diff --git a/pom.xml b/pom.xml
index d4a890b..3845fdd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
   <groupId>com.googlesource.gerrit.plugins.server-config</groupId>
   <artifactId>server-config</artifactId>
   <packaging>jar</packaging>
-  <version>2.8-SNAPSHOT</version>
+  <version>2.9-SNAPSHOT</version>
   <name>server-config</name>
 
   <properties>