Added 'feature' defined resource. Old openstack_hyper_v::base::windows_feature

This patch imports the *windows_feature* functionality implemented in *openstack_hyper_v*. It allows the user to define resources like:
```
windows_common::feature { 'Hyper-V':
  ensure => present,
}
 
windows_common::feature { 'Telnet-Server':
  ensure => absent,
} 
```