Add use_local_time, post_command and pre_command LWRP attributes

- use_local_time - rotate log files using local time zone of server
- post_command - run this command after rotating file
- pre_command - run this command before rotating file
Merge pull request #7 from wanelo-chef/add_logadm_actions

Add use_local_time, post_command and pre_command LWRP attributes