Fixed support for "Bearer" and "Token" auth-schemes.

Removed the test for "Authentication: Bearer Token <TOKEN>" which was not supposed to exist (see https://github.com/channelcat/sanic/pull/821)
Also added a call to `split` when retrieving the token value to handle cases where there are leading or trailing spaces.

tests/test_requests.py

@@ -172,16 +172,6 @@ def test_token():
 
     assert request.token == token
 
-    token = 'a1d895e0-553a-421a-8e22-5ff8ecb48cbf'
-    headers = {
-        'content-type': 'application/json',
-        'Authorization': 'Bearer Token {}'.format(token)
-    }
-
-    request, response = app.test_client.get('/', headers=headers)
-
-    assert request.token == token
-    
     token = 'a1d895e0-553a-421a-8e22-5ff8ecb48cbf'
     headers = {
         'content-type': 'application/json',