Use simplejson to load json file

The simplejson extends json library. It provides sufficient information about
JSON syntax errors, which often occurs during instackenv.json file creation.

Change-Id: Ied1c080678af728820e02b7b99c51762b49b1449
Closes-Bug: #1693442
Depends on external: https://review.rdoproject.org/r/#/c/7872/

requirements.txt

@@ -11,6 +11,7 @@ python-heatclient>=1.6.1 # Apache-2.0
 python-ironicclient>=1.14.0 # Apache-2.0
 python-mistralclient>=3.1.0 # Apache-2.0
 python-openstackclient!=3.10.0,>=3.3.0 # Apache-2.0
+simplejson>=2.2.0 # MIT
 six>=1.9.0 # MIT
 osc-lib>=1.7.0 # Apache-2.0
 websocket-client>=0.32.0 # LGPLv2+

tripleoclient/utils.py

@@ -17,10 +17,10 @@ from __future__ import print_function
 import csv
 import datetime
 import hashlib
-import json
 import logging
 import os
 import os.path
+import simplejson
 import six
 import socket
 import subprocess
@@ -647,7 +647,7 @@ def _csv_to_nodes_dict(nodes_csv):
 
 def parse_env_file(env_file, file_type=None):
     if file_type == 'json' or env_file.name.endswith('.json'):
-        nodes_config = json.load(env_file)
+        nodes_config = simplejson.load(env_file)
     elif file_type == 'csv' or env_file.name.endswith('.csv'):
         nodes_config = _csv_to_nodes_dict(env_file)
     elif env_file.name.endswith('.yaml'):

tripleoclient/v1/baremetal.py

@@ -16,8 +16,8 @@
 from __future__ import print_function
 
 import argparse
-import json
 import logging
+import simplejson
 import time
 import uuid
 
@@ -50,7 +50,7 @@ class ValidateInstackEnv(command.Command):
         self.error_count = 0
 
         with open(parsed_args.instackenv, 'r') as net_file:
-            env_data = json.load(net_file)
+            env_data = simplejson.load(net_file)
 
         maclist = []
         baremetal_ips = []
@@ -356,7 +356,7 @@ class ConfigureReadyState(command.Command):
         self.bm_client = self.app.client_manager.baremetal
 
         with open(parsed_args.file, 'r') as fp:
-            self.ready_state_config = json.load(fp)
+            self.ready_state_config = simplejson.load(fp)
 
         drac_nodes = []
         for node in self.bm_client.node.list(detail=True):

tripleoclient/v1/overcloud_parameters.py

@@ -11,9 +11,9 @@
 #   under the License.
 
 import argparse
-import json
 import logging
 import os
+import simplejson
 import yaml
 
 from osc_lib.command import command
@@ -44,7 +44,7 @@ class SetParameters(command.Command):
         self.log.debug("take_action(%s)" % parsed_args)
 
         if parsed_args.file_in.name.endswith('.json'):
-            params = json.load(parsed_args.file_in)
+            params = simplejson.load(parsed_args.file_in)
         elif parsed_args.file_in.name.endswith('.yaml'):
             params = yaml.safe_load(parsed_args.file_in)
         else: