Allow module self-reference in loader

recipes/example/module_self_ref.py

Index: recipes/example/module_self_ref.py
diff --git a/recipes/example/module_self_ref.py b/recipes/example/module_self_ref.py
new file mode 100644
index 0000000000000000000000000000000000000000..be95df2be3559403a636933b3b726c22f0d9085e
--- /dev/null
+++ b/recipes/example/module_self_ref.py
@@ -0,0 +1,23 @@
+# Copyright 2017 The LUCI Authors. All rights reserved.
+# Use of this source code is governed under the Apache License, Version 2.0
+# that can be found in the LICENSE file.
+
+DEPS = [
+    'step',
+]
+
+
+def RunSteps(api):
+  # This tests that a module self-reference via .m works. Below example looks
+  # rather artificial, but it can be useful in more complex usage, where api
+  # is passed around.
+  #
+  # It's also a regression test for the following error which would otherwise
+  # appear here:
+  #
+  # ModuleInjectionError: Recipe Module 'step' has no dependency 'step'.
+  api.step.m.step('foo', ['true'])
+
+
+def GenTests(api):
+  yield api.test('basic')