schema: introduce StringMap; kill MapType and ListType

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 210 matching lines @@
         []string{
                 "broken",
         },
 )
 
 func newConfig(cfg *config.Config) (*environConfig, error) {
         m0, err := checker.Coerce(cfg.UnknownAttrs(), nil)
         if err != nil {
                 return nil, err
         }
-        m1 := m0.(schema.MapType)
+        m1 := m0.(map[string]interface{})
         ecfg := &environConfig{
                 Config:    cfg,
                 zookeeper: m1["zookeeper"].(bool),
         }
         ecfg.broken, _ = m1["broken"].(bool)
         return ecfg, nil
 }
 
 func (p *environProvider) Open(cfg *config.Config) (environs.Environ, error) {
         p.mu.Lock()
@@ skipping 252 matching lines @@
                 panic(fmt.Errorf("Ports with mismatched machine id, expected %d got %d", inst.machineId, machineId))
         }
         inst.state.mu.Lock()
         defer inst.state.mu.Unlock()
         for p := range inst.ports {
                 ports = append(ports, p)
         }
         state.SortPorts(ports)
         return
 }