Merge branch 'stable-3.1' into master

* stable-3.1:
  Bump Bazel version to 3.7.0
  Upgrade bazlets to latest stable-3.0 to build with 3.0.13 API

Change-Id: I3d468e740f4360c86033bd16ab41863d2771f6b3
diff --git a/WORKSPACE b/WORKSPACE
index 5811677..56b3c97 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "3f9dadc615dc4053369a42d9ada37dafd8d4763c",
+    commit = "0f81174e3d1b892a1342ebc75bb4bbb158ae0efe",
     #local_path = "/home/<user>/projects/bazlets",
 )
 
diff --git a/src/test/java/com/ericsson/gerrit/plugins/heartbeat/HeartbeatIT.java b/src/test/java/com/ericsson/gerrit/plugins/heartbeat/HeartbeatIT.java
index 98d87ad..516db73 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/heartbeat/HeartbeatIT.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/heartbeat/HeartbeatIT.java
@@ -16,7 +16,7 @@
 
 import static com.google.common.truth.Truth.assertWithMessage;
 
-import com.google.gerrit.acceptance.GlobalPluginConfig;
+import com.google.gerrit.acceptance.config.GlobalPluginConfig;
 import com.google.gerrit.acceptance.LightweightPluginDaemonTest;
 import com.google.gerrit.acceptance.NoHttpd;
 import com.google.gerrit.acceptance.TestPlugin;