Change import paths to be absolute, change pythonpath for config app

config_app/config_endpoints/api/__init__.py

@@ -3,10 +3,13 @@ import logging
 from flask import Blueprint
 from flask_restful import Resource, Api
 from flask_restful.utils.cors import crossdomain
-from config_app import app
+from email.utils import formatdate
+from calendar import timegm
 from functools import partial, wraps
 from jsonschema import validate, ValidationError
-from config_endpoints.exception import InvalidResponse
+
+from config_app.c_app import app
+from config_app.config_endpoints.exception import InvalidResponse
 
 logger = logging.getLogger(__name__)
 api_bp = Blueprint('api', __name__)
@@ -28,6 +31,13 @@ api = ApiExceptionHandlingApi()
 api.init_app(api_bp)
 
 
+def format_date(date):
+    """ Output an RFC822 date format. """
+    if date is None:
+        return None
+    return formatdate(timegm(date.utctimetuple()))
+
+
 def verify_not_prod(func):
     @add_method_metadata('enterprise_only', True)
     @wraps(func)