Cleanup VM Manager policy code

[msune]

Cleanup unused folder and files:

https://github.com/fp7-ofelia/ocf/tree/ofelia.stable/vt_manager/src/python/vt_manager/controller/policy

Cleanup file:

https://github.com/fp7-ofelia/ocf/blob/ofelia.stable/vt_manager/src/python/vt_manager/controller/policies/ControllerMappings.py

• Delete commented lines
• Write more accurate mapping names. DO NOT delete them, simply add an alias, otherwise it will not be backwards compatible: for instance vm.project and vm.slice has no real meaning, should be project and slice. Also number.vms should be project.number_of_vms or something similar.

[OscarMoya]

Done.

Old PolicyManager code deleted and ControllerMappings names improved.

I'm not sure if there is still any surpluss or if any mapping is missing. Please comment and I will add/remove these.

[msune]

Please delete action something. Implement a simple log action

[OscarMoya]

Done.

logVM action added to action mappings.When this action is executed, some parameters of a VM (Name |RAM |HD size) are printed.

I also implemented a Logger utility for PolicyEngine called PolicyLogger. This logger records the results of logVM, captures the exceptions raised from terminal rules and shows an "OK!" message when all policies (enabled ones) have been accepted. The output file of this logger is located at vt_manager/src/python/vt_manager/controller/policies/utils/log/pe.log

If somethng is still missing, please say so.

[CarolinaFernandez]

Permissions of /opt/ofelia/vt_manager/src/python/vt_manager/controller/policies/utils/log folder are not OK (VM manager shows internal server error when trying to write to pe.log).

For I/O it is required to set user www-data or either complete permissions.

[lbergesio]

The permissions are now managed by ofver, git ignores them except for the x flag.