various: gocheck, checkers, imports fixes

cmd/juju/destroyservice_test.go

 // Copyright 2013 Canonical Ltd.
 // Licensed under the AGPLv3, see LICENCE file for details.
 
 package main
 
 import (
         gc "launchpad.net/gocheck"
+
         jujutesting "launchpad.net/juju-core/juju/testing"
         "launchpad.net/juju-core/state"
         "launchpad.net/juju-core/testing"
 )
 
 type DestroyServiceSuite struct {
         jujutesting.RepoSuite
 }
 
 var _ = gc.Suite(&DestroyServiceSuite{})
@@ skipping 22 matching lines @@
 }
 
 func (s *DestroyServiceSuite) TestInvalidArgs(c *gc.C) {
         err := runDestroyService(c)
         c.Assert(err, gc.ErrorMatches, `no service specified`)
         err = runDestroyService(c, "ping", "pong")
         c.Assert(err, gc.ErrorMatches, `unrecognized args: \["pong"\]`)
         err = runDestroyService(c, "invalid:name")
         c.Assert(err, gc.ErrorMatches, `invalid service name "invalid:name"`)
 }