Set Authorization header correctly in Bearer Signer (#4273)

Author: trivikr

.changes/next-release/bugfix-Signer-19c64295.json

@@ -0,0 +1,5 @@
+{
+  "type": "bugfix",
+  "category": "Signer",
+  "description": "Set Authorization header correctly in Bearer Signer"
+}

lib/signers/bearer.js

@@ -9,6 +9,6 @@ AWS.Signers.Bearer = AWS.util.inherit(AWS.Signers.RequestSigner, {
   },
 
   addAuthorization: function addAuthorization(token) {
-    this.request.httpRequest.headers['Authorization'] = 'Bearer ' + token.token;
+    this.request.headers['Authorization'] = 'Bearer ' + token.token;
   }
 });