Update Gerrit version to 2.15-SNAPSHOT

Change-Id: I7593c053851544b62fe653031c4dbbc1ff262e91
diff --git a/gerrit_api_maven_local.bzl b/gerrit_api_maven_local.bzl
index 2e26af9..92bdb89 100644
--- a/gerrit_api_maven_local.bzl
+++ b/gerrit_api_maven_local.bzl
@@ -4,7 +4,7 @@
 gerrit_api is rule for fetching Gerrit plugin API using Bazel.
 """
 
-VER = "2.14-SNAPSHOT"
+VER = "2.15-SNAPSHOT"
 
 def gerrit_api_maven_local():
   maven_jar(