Rename uses of enterprise_token to enterprise_id

This parameter is referred to as enterprise_id in the Box
Developer documentation. Also, the noun "token" is already used
to refer to the data returned at the end of the auth process. So
rename this to reduce confusion.

This is a backwards compatible change, because the method
parameter names were already correct. This is only a change to
private attributes, test code, and documentation.

Author: jmoldow

README.rst

@@ -248,7 +248,7 @@ instead use an instance of `JWTAuth`.
     auth = JWTAuth(
         client_id='YOUR_CLIENT_ID',
         client_secret='YOUR_CLIENT_SECRET',
-        enterprise_token='YOUR_ENTERPRISE_TOKEN',
+        enterprise_id='YOUR_ENTERPRISE_ID',
         rsa_private_key_file_sys_path='CERT.PEM',
         store_tokens=your_store_tokens_callback_method,
     )
@@ -272,7 +272,7 @@ These users can then be authenticated:
     ned_auth = JWTAuth(
        client_id='YOUR_CLIENT_ID',
        client_secret='YOUR_CLIENT_SECRET',
-       enterprise_token='YOUR_ENTERPRISE_TOKEN',
+       enterprise_id='YOUR_ENTERPRISE_ID',
        rsa_private_key_file_sys_path='CERT.PEM',
        store_tokens=your_store_tokens_callback_method,
    )

boxsdk/auth/jwt_auth.py

@@ -93,7 +93,7 @@ def __init__(
                 password=rsa_private_key_passphrase,
                 backend=default_backend(),
             )
-        self._enterprise_token = enterprise_id
+        self._enterprise_id = enterprise_id
         self._jwt_algorithm = jwt_algorithm
         self._user_id = None
 
@@ -170,7 +170,7 @@ def authenticate_instance(self):
         :rtype:
             `unicode`
         """
-        return self._auth_with_jwt(self._enterprise_token, 'enterprise')
+        return self._auth_with_jwt(self._enterprise_id, 'enterprise')
 
     def _refresh(self, access_token):
         """

test/unit/auth/test_jwt_auth.py

@@ -48,7 +48,7 @@ def jwt_auth_init_mocks(
         successful_token_response,
         jwt_algorithm,
         rsa_passphrase,
-        enterprise_token=None,
+        enterprise_id=None,
 ):
     # pylint:disable=redefined-outer-name
     fake_client_id = 'fake_client_id'
@@ -70,7 +70,7 @@ def jwt_auth_init_mocks(
             oauth = JWTAuth(
                 client_id=fake_client_id,
                 client_secret=fake_client_secret,
-                enterprise_id=enterprise_token,
+                enterprise_id=enterprise_id,
                 rsa_private_key_file_sys_path=sentinel.rsa_path,
                 rsa_private_key_passphrase=rsa_passphrase,
                 network_layer=mock_network_layer,
@@ -153,15 +153,15 @@ def test_authenticate_instance_sends_post_request_with_correct_params(
         rsa_passphrase,
 ):
     # pylint:disable=redefined-outer-name
-    enterprise_token = 'fake_enterprise_token'
+    enterprise_id = 'fake_enterprise_id'
     with jwt_auth_init_mocks(
         mock_network_layer,
         successful_token_response,
         jwt_algorithm,
         rsa_passphrase,
-        enterprise_token,
+        enterprise_id,
     ) as params:
-        with jwt_auth_auth_mocks(jti_length, jwt_algorithm, enterprise_token, 'enterprise', *params) as oauth:
+        with jwt_auth_auth_mocks(jti_length, jwt_algorithm, enterprise_id, 'enterprise', *params) as oauth:
             oauth.authenticate_instance()
 
 
@@ -188,13 +188,13 @@ def test_refresh_instance_sends_post_request_with_correct_params(
         rsa_passphrase,
 ):
     # pylint:disable=redefined-outer-name
-    enterprise_token = 'fake_enterprise_token'
+    enterprise_id = 'fake_enterprise_id'
     with jwt_auth_init_mocks(
         mock_network_layer,
         successful_token_response,
         jwt_algorithm,
         rsa_passphrase,
-        enterprise_token,
+        enterprise_id,
     ) as params:
-        with jwt_auth_auth_mocks(jti_length, jwt_algorithm, enterprise_token, 'enterprise', *params) as oauth:
+        with jwt_auth_auth_mocks(jti_length, jwt_algorithm, enterprise_id, 'enterprise', *params) as oauth:
             oauth.refresh(None)