Update Gerrit-ApiVersion in pom.xml to 2.9-SNAPSHOT

Change-Id: Ibcfbc4a50e629e3ad72327909b76217324e7c54c
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

pom.xml

diff --git a/pom.xml b/pom.xml
index 20c90d9..7336fbe 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
 
   <properties>
     <Gerrit-ApiType>plugin</Gerrit-ApiType>
-    <Gerrit-ApiVersion>2.8-SNAPSHOT</Gerrit-ApiVersion>
+    <Gerrit-ApiVersion>2.9-SNAPSHOT</Gerrit-ApiVersion>
   </properties>
 
   <build>