Update bazlets to latest stable-2.15 and use released 2.15.1 API

Change-Id: I94e0d1801ebcc195f5d380d162995f55775eaae2
diff --git a/WORKSPACE b/WORKSPACE
index a13c1ac..3cea0d8 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,24 +3,24 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "34d5ef186f73c80e61dcfa057ee400b2725164bf",
+    commit = "df6622a4e725b4d0bad99377f05749171a8c94b9",
     #    local_path = "/home/<user>/projects/bazlets",
 )
 
 # Release Plugin API
-#load(
-#    "@com_googlesource_gerrit_bazlets//:gerrit_api.bzl",
-#    "gerrit_api",
-#)
-
-# Snapshot Plugin API
 load(
-    "@com_googlesource_gerrit_bazlets//:gerrit_api_maven_local.bzl",
-    "gerrit_api_maven_local",
+    "@com_googlesource_gerrit_bazlets//:gerrit_api.bzl",
+    "gerrit_api",
 )
 
+# Snapshot Plugin API
+#load(
+#    "@com_googlesource_gerrit_bazlets//:gerrit_api_maven_local.bzl",
+#    "gerrit_api_maven_local",
+#)
+
 # Load release Plugin API
-#gerrit_api()
+gerrit_api()
 
 # Load snapshot Plugin API
-gerrit_api_maven_local()
+#gerrit_api_maven_local()