state/api: Split client Machiner into subpackage

state/apiserver/server_test.go

 // Copyright 2012, 2013 Canonical Ltd.
 // Licensed under the AGPLv3, see LICENCE file for details.
 
 package apiserver_test
 
 import (
         "io"
         . "launchpad.net/gocheck"
         "launchpad.net/juju-core/rpc"
         "launchpad.net/juju-core/state"
@@ skipping 25 matching lines @@
         // s.APIConn.
         st, err := api.Open(&api.Info{
                 Tag:      stm.Tag(),
                 Password: "password",
                 Addrs:    []string{srv.Addr()},
                 CACert:   []byte(coretesting.CACert),
         })
         c.Assert(err, IsNil)
         defer st.Close()
 
-        _, err = st.Machiner("")
+        _, err = st.Machiner()
         c.Assert(err, IsNil)
 
         err = srv.Stop()
         c.Assert(err, IsNil)
 
-        _, err = st.Machiner("")
+        _, err = st.Machiner()
         // The client has not necessarily seen the server shutdown yet,
         // so there are two possible errors.
         if err != rpc.ErrShutdown && err != io.ErrUnexpectedEOF {
                 c.Fatalf("unexpected error from request: %v", err)
         }
 
         // Check it can be stopped twice.
         err = srv.Stop()
         c.Assert(err, IsNil)
 }