gerrit-events 2.6.1

Bumped gerrit-events version to get com.jcraft.jsch to 0.1.51.
See sonyxperiadev/gerrit-events#32

NOTE: Backport from gerrit-trigger-2.13.0-beta-4 series.

pom.xml

@@ -62,7 +62,7 @@
         <dependency>
             <groupId>com.sonymobile.tools.gerrit</groupId>
             <artifactId>gerrit-events</artifactId>
-            <version>2.4.2</version>
+            <version>2.6.1</version>
             <!-- New source is here: https://github.com/sonyxperiadev/gerrit-events -->
         </dependency>
         <dependency>