various: gocheck, checkers, imports fixes

state/statecmd/addrelation_test.go

 // Copyright 2013 Canonical Ltd.
 // Licensed under the AGPLv3, see LICENCE file for details.
 
 package statecmd_test
 
 import (
         gc "launchpad.net/gocheck"
+
         "launchpad.net/juju-core/charm"
         "launchpad.net/juju-core/juju/testing"
         "launchpad.net/juju-core/state/api/params"
         "launchpad.net/juju-core/state/statecmd"
 )
 
 type AddRelationSuite struct {
         testing.JujuConnSuite
 }
 
@@ skipping 86 matching lines @@
         eps, err := s.State.InferEndpoints([]string{"wordpress", "mysql"})
         c.Assert(err, gc.IsNil)
         _, err = s.State.AddRelation(eps...)
         c.Assert(err, gc.IsNil)
         // And try to add it again.
         _, err = statecmd.AddRelation(s.State, params.AddRelation{
                 Endpoints: []string{"wordpress", "mysql"},
         })
         c.Assert(err, gc.ErrorMatches, `cannot add relation "wordpress:db mysql:server": relation already exists`)
 }