[IMP] hr_holidays:

[IMP] hr_holidays:
- added a workflow transition from refuse to draft, to allow resetting
a refused request
- resetting is now based on a can_reset field, taht is based on whether
it is my own request or I am an hr manager
- added an access right on crm_meeting that was preventing hr officers
to validate some requests
- improved form view to show reset to draft button accordingly
- added tests that helped trigerred the various bugs and improvements

bzr revid: tde@openerp.com-20130809144752-o21pjbc56o0t8fym