Description of problem:
If user clicks Activate button on host that is already Up, the error message is literally 'Cannot ${action} ${type}. Host in Up status.'

Version-Release number of selected component (if applicable):
ovirt-engine-backend-3.0.0_0001-1.2.fc16.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Have host in maintenance
2. Click activate and then again
  
Actual results:
Cannot ${action} ${type}. Host in Up status

Expected results:
Cannot activate host. Host in Up status

Additional info:
2012-01-20 15:00:24,926 INFO  [org.ovirt.engine.core.bll.HandleVdsVersionCommand] (QuartzScheduler_Worker-99) Running command: HandleVdsVersionCommand internal: true. Entities affected :  ID: 29291ea0-41ac-11e1-886e-001a4a013f0a Type: VDS
2012-01-20 15:00:25,616 WARN  [org.ovirt.engine.core.bll.ActivateVdsCommand] (http--0.0.0.0-8443-1) CanDoAction of action ActivateVds failed. Reasons:VDS_CANNOT_ACTIVATE_VDS_ALREADY_UP