485074: Bundle redeploy does not work in snapshot builds 

- Add a new factory method to VirgoRuntimeProvider hierarchy for  
  instantiating the redeploy command
- Implement the method by delegating to the deploy command for  
  Virgo < 3.5
- Use new code for Virgo >= 3.5
- Update DefaultServerDeployer to use redeploy command

Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=485074
5 files changed