Revert "Update hawk to 7.0.7 (#2880)"

This reverts commit cfd2307.

package.json

@@ -35,7 +35,7 @@
     "forever-agent": "~0.6.1",
     "form-data": "~2.3.1",
     "har-validator": "~5.0.3",
-    "hawk": "~7.0.7",
+    "hawk": "~6.0.2",
     "http-signature": "~1.2.0",
     "is-typedarray": "~1.0.0",
     "isstream": "~0.1.2",

request.js

@@ -1426,7 +1426,7 @@ Request.prototype.httpSignature = function (opts) {
 }
 Request.prototype.hawk = function (opts) {
   var self = this
-  self.setHeader('Authorization', hawk.client.header(self.uri, self.method, opts).header)
+  self.setHeader('Authorization', hawk.client.header(self.uri, self.method, opts).field)
 }
 Request.prototype.oauth = function (_oauth) {
   var self = this

tests/test-hawk.js

@@ -7,24 +7,22 @@ var tape = require('tape')
 var assert = require('assert')
 
 var server = http.createServer(function (req, res) {
-  var getCred = function (id) {
+  var getCred = function (id, callback) {
     assert.equal(id, 'dh37fgj492je')
     var credentials = {
       key: 'werxhqb98rpaxn39848xrunpaw3489ruxnpa98w4rxn',
       algorithm: 'sha256',
       user: 'Steve'
     }
-    return credentials
+    return callback(null, credentials)
   }
-  hawk.server.authenticate(req, getCred)
-    .then((credentials, artifacts) => {
-      res.writeHead(200, {'Content-Type': 'text/plain'})
-      res.end('Hello ' + credentials.credentials.user)
-    })
-    .catch(() => {
-      res.writeHead(401, {'Content-Type': 'text/plain'})
-      res.end('Shoosh!')
+
+  hawk.server.authenticate(req, getCred, {}, function (err, credentials, attributes) {
+    res.writeHead(err ? 401 : 200, {
+      'Content-Type': 'text/plain'
     })
+    res.end(err ? 'Shoosh!' : 'Hello ' + credentials.user)
+  })
 })
 
 tape('setup', function (t) {