[Config Save] Error happen when config save a filename with quotation…

… mark

When the filename passed to the CLI command 'config save' contains the
special character - double quote, it needs to add an escape character
'\' before the double quote to let bash treat it as a literal character.

However, the filename passed into the python code also contains the
escape character and it will cause a 'file-not-found' error when simply
passes that filename to 'read_json_file()'.

To fix the error, use 'echo' command with the filename to strip the
special character.

config/main.py

@@ -1267,6 +1267,9 @@ def save(filename):
         log.log_info("'save' executing...")
         clicommon.run_command(command, display_cmd=True)
 
+        command = "echo " + file
+        file = subprocess.getoutput(command)
+
         config_db = sort_dict(read_json_file(file))
         with open(file, 'w') as config_db_file:
             json.dump(config_db, config_db_file, indent=4)