Set gerrit maven local api to version 2.14.7-SNAPSHOT

2.14.7-SNAPSHOT contains a fix for plugin IT tests with @PluginData
annotation, update the version here so plugin can use this version of
bazlets if needed.

Change-Id: I151b48e47be861887ea55fee5793ad657bdaa7c5
diff --git a/gerrit_api_maven_local.bzl b/gerrit_api_maven_local.bzl
index b1fe421..f703240 100644
--- a/gerrit_api_maven_local.bzl
+++ b/gerrit_api_maven_local.bzl
@@ -5,7 +5,7 @@
 gerrit_api is rule for fetching Gerrit plugin API using Bazel.
 """
 
-VER = "2.15-SNAPSHOT"
+VER = "2.14.7-SNAPSHOT"
 
 def gerrit_api_maven_local():
   bouncycastle_repos()