Set Gerrit to v3.6.0-rc0

Bug: Issue 15840
Change-Id: I46588e9f923e29dc41b63280d52f573cdaed3c23

build.sbt

diff --git a/build.sbt b/build.sbt
index ef222ce..9e5666c 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 enablePlugins(GitVersioning)
 
-val gerritApiVersion = "3.5.0-rc2"
+val gerritApiVersion = "3.6.0-rc0"
 
 val pluginName = "analytics"