add AssignmentPolicy to Environ

environs/dummy/environs.go

 // The dummy provider implements an environment provider for testing
 // purposes, registered with environs under the name "dummy".
 //·
 // The configuration YAML for the testing environment
 // must specify a "zookeeper" property with a boolean
 // value. If this is true, a zookeeper instance will be started
 // the first time StateInfo is called on a newly reset environment.
 // NOTE: ZooKeeper isn't actually being started yet.
 //·
 // The configuration data also accepts a "broken" property
@@ skipping 292 matching lines @@
 func (e *environ) StateInfo() (*state.Info, error) {
         if e.isBroken() {
                 return nil, errBroken
         }
         if e.config.zookeeper && e.state.bootstrapped {
                 return stateInfo(), nil
         }
         return nil, errors.New("no state info available for this environ")
 }
 
-func (e *environ) PlacementPolicy() state.PlacementPolicy {
-        return state.PlaceUnassigned
+func (e *environ) AssignmentPolicy() state.AssignmentPolicy {
+        return state.AssignUnused
 }
 
 func (e *environ) SetConfig(cfg environs.EnvironConfig) {
         config := cfg.(*environConfig)
         e.configMutex.Lock()
         defer e.configMutex.Unlock()
         e.config = config
 }
 
 func (e *environ) Destroy([]environs.Instance) error {
@@ skipping 77 matching lines @@
         return m.id
 }
 
 func (m *instance) DNSName() (string, error) {
         return m.id + ".dns", nil
 }
 
 func (m *instance) WaitDNSName() (string, error) {
         return m.DNSName()
 }