Make transitive starlark loads explicit

This fixes the build with bazel 0.25.

Bug: Issue 10855
Change-Id: I480b5a929a48ce327daf95d7f74e167e50aeed6d
diff --git a/WORKSPACE b/WORKSPACE
index fe949fa..e1eb416 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "c9dad39dbf8c9fa3ec955ac5fb3e2312163136ee",
+    commit = "51049da0140c58ee26f8285bca4393c5e43ce4a1",
     #local_path = "/home/<user>/projects/bazlets",
 )
 
diff --git a/tools/bzl/classpath.bzl b/tools/bzl/classpath.bzl
index d5764f7..c921d01 100644
--- a/tools/bzl/classpath.bzl
+++ b/tools/bzl/classpath.bzl
@@ -1,4 +1,6 @@
 load(
     "@com_googlesource_gerrit_bazlets//tools:classpath.bzl",
-    "classpath_collector",
+    _classpath_collector = "classpath_collector",
 )
+
+classpath_collector = _classpath_collector
diff --git a/tools/bzl/junit.bzl b/tools/bzl/junit.bzl
index 3af7e58..97307bd 100644
--- a/tools/bzl/junit.bzl
+++ b/tools/bzl/junit.bzl
@@ -1,4 +1,6 @@
 load(
     "@com_googlesource_gerrit_bazlets//tools:junit.bzl",
-    "junit_tests",
+    _junit_tests = "junit_tests",
 )
+
+junit_tests = _junit_tests
diff --git a/tools/bzl/maven_jar.bzl b/tools/bzl/maven_jar.bzl
index 2eabedb..35ea8ce 100644
--- a/tools/bzl/maven_jar.bzl
+++ b/tools/bzl/maven_jar.bzl
@@ -1 +1,3 @@
-load("@com_googlesource_gerrit_bazlets//tools:maven_jar.bzl", "maven_jar")
+load("@com_googlesource_gerrit_bazlets//tools:maven_jar.bzl", _maven_jar = "maven_jar")
+
+maven_jar = _maven_jar
diff --git a/tools/bzl/plugin.bzl b/tools/bzl/plugin.bzl
index 0b25d23..4d2dbdd 100644
--- a/tools/bzl/plugin.bzl
+++ b/tools/bzl/plugin.bzl
@@ -1,6 +1,10 @@
 load(
     "@com_googlesource_gerrit_bazlets//:gerrit_plugin.bzl",
-    "PLUGIN_DEPS",
-    "PLUGIN_TEST_DEPS",
-    "gerrit_plugin",
+    _gerrit_plugin = "gerrit_plugin",
+    _plugin_deps = "PLUGIN_DEPS",
+    _plugin_test_deps = "PLUGIN_TEST_DEPS",
 )
+
+gerrit_plugin = _gerrit_plugin
+PLUGIN_DEPS = _plugin_deps
+PLUGIN_TEST_DEPS = _plugin_test_deps