Merge branch 'stable-3.9'

* stable-3.9:
  Bump Gerrit to v3.9.0-rc2

Change-Id: If66ac96624858d312326769af2ca00357adcc3b6

build.sbt

diff --git a/build.sbt b/build.sbt
index 46b0942..4140349 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 enablePlugins(GitVersioning)
 
-val gerritApiVersion = "3.8.0-rc4"
+val gerritApiVersion = "3.9.0-rc2"
 
 val pluginName = "analytics"