format token expires time to prevent json loading datetime data

When output to shell, the token issue time is fine; however when
selecting the json formatter (via the --format json) option, an
exception is raised when formatting the dataetime data.

Rather than pass in the datetime data, we should format the data
with the ISO 8601 formatting.

Closes-Bug: 1619937
Change-Id: Iffebb2d5413fabfd283dfa94fc560fc37270f9dd

openstackclient/identity/v2_0/token.py

@@ -42,7 +42,9 @@ class IssueToken(command.ShowOne):
         if auth_ref.auth_token:
             data['id'] = auth_ref.auth_token
         if auth_ref.expires:
-            data['expires'] = auth_ref.expires
+            datetime_obj = auth_ref.expires
+            expires_str = datetime_obj.strftime('%Y-%m-%dT%H:%M:%S%z')
+            data['expires'] = expires_str
         if auth_ref.project_id:
             data['project_id'] = auth_ref.project_id
         if auth_ref.user_id:

openstackclient/identity/v3/token.py

@@ -183,7 +183,9 @@ class IssueToken(command.ShowOne):
         if auth_ref.auth_token:
             data['id'] = auth_ref.auth_token
         if auth_ref.expires:
-            data['expires'] = auth_ref.expires
+            datetime_obj = auth_ref.expires
+            expires_str = datetime_obj.strftime('%Y-%m-%dT%H:%M:%S%z')
+            data['expires'] = expires_str
         if auth_ref.project_id:
             data['project_id'] = auth_ref.project_id
         if auth_ref.user_id:

openstackclient/tests/identity/v2_0/fakes.py

@@ -80,7 +80,7 @@ USER = {
     'enabled': True,
 }
 
-token_expires = '2014-01-01T00:00:00Z'
+token_expires = '2016-09-05T18:04:52+0000'
 token_id = 'token-id-' + uuid.uuid4().hex
 
 TOKEN = {

openstackclient/tests/identity/v2_0/test_token.py

@@ -58,7 +58,7 @@ class TestTokenIssue(TestToken):
         collist = ('expires', 'id', 'project_id', 'user_id')
         self.assertEqual(collist, columns)
         datalist = (
-            auth_ref.expires,
+            identity_fakes.token_expires,
             identity_fakes.token_id,
             'project-id',
             'user-id',
@@ -86,7 +86,7 @@ class TestTokenIssue(TestToken):
         )
         self.assertEqual(collist, columns)
         datalist = (
-            auth_ref.expires,
+            identity_fakes.token_expires,
             identity_fakes.token_id,
             'user-id',
         )

openstackclient/tests/identity/v3/fakes.py

@@ -252,7 +252,7 @@ TRUST = {
     'trustor_user_id': user_id,
 }
 
-token_expires = '2014-01-01T00:00:00Z'
+token_expires = '2016-09-05T18:04:52+0000'
 token_id = 'tttttttt-tttt-tttt-tttt-tttttttttttt'
 
 UNSCOPED_TOKEN = {

openstackclient/tests/identity/v3/test_token.py

@@ -55,7 +55,7 @@ class TestTokenIssue(TestToken):
         collist = ('expires', 'id', 'project_id', 'user_id')
         self.assertEqual(collist, columns)
         datalist = (
-            auth_ref.expires,
+            identity_fakes.token_expires,
             identity_fakes.token_id,
             identity_fakes.project_id,
             identity_fakes.user_id,
@@ -82,7 +82,7 @@ class TestTokenIssue(TestToken):
         self.assertEqual(collist, columns)
         datalist = (
             identity_fakes.domain_id,
-            auth_ref.expires,
+            identity_fakes.token_expires,
             identity_fakes.token_id,
             identity_fakes.user_id,
         )
@@ -109,7 +109,7 @@ class TestTokenIssue(TestToken):
         )
         self.assertEqual(collist, columns)
         datalist = (
-            auth_ref.expires,
+            identity_fakes.token_expires,
             identity_fakes.token_id,
             identity_fakes.user_id,
         )