Security user log access

Security user logs are accessible when both the authentication and authorization are local. A default group called the default-security-group is available in manager mode and has the privileges to execute the commands copy security-log, show security-logging and clear security-logging. When a security user is attached to the group, they will only be able to execute the three commands. Any other user will not be able to execute the commands, no matter whether they are an operator or manager.