Merge pull request #179 from Keisim/m2_fix_headers_parameter

Fix propagating headers across different class instances

Author: mraineri

src/redfish/rest/v1.py

@@ -986,7 +986,7 @@ def _rest_request(self, path, method='GET', args=None, body=None,
         else:
             raise RetriesExhaustedError() from cause_exception
 
-    def login(self, username=None, password=None, auth=AuthMethod.SESSION, headers={}):
+    def login(self, username=None, password=None, auth=AuthMethod.SESSION, headers=None):
         """Login and start a REST session.  Remember to call logout() when"""
         """ you are done.
 
@@ -1006,6 +1006,8 @@ def login(self, username=None, password=None, auth=AuthMethod.SESSION, headers={
         self.__username = username if username else self.__username
         self.__password = password if password else self.__password
 
+        headers = headers if headers else {}
+
         if auth == AuthMethod.BASIC:
             auth_key = base64.b64encode(('%s:%s' % (self.__username,
                             self.__password)).encode('utf-8')).decode('utf-8')