Merge branch 'stable-3.1'

* stable-3.1:
  Office365OAuthService: Restore Accept header in user info request
  Upgrade bazlets to latest stable-2.16

Change-Id: I02ab844c30a7b22caa5036e7aefd9a2992baedba
diff --git a/WORKSPACE b/WORKSPACE
index 150486d..4730c1d 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "b6cb89690a5e06261932eb30c95fd8db34a7943a",
+    commit = "74f9d8e76d5014d218ae6fe55127a5288c9a32c3",
     #local_path = "/home/<user>/projects/bazlets",
 )