Add putFakeTools to openstack tests

environs/ec2/local_test.go

 package ec2_test
 
 import (
         "bytes"
         "launchpad.net/goamz/aws"
         amzec2 "launchpad.net/goamz/ec2"
         "launchpad.net/goamz/ec2/ec2test"
         "launchpad.net/goamz/s3"
         "launchpad.net/goamz/s3/s3test"
         . "launchpad.net/gocheck"
@@ skipping 354 matching lines @@
         t.env = t.tests.Env
 }
 
 func (t *localNonUSEastSuite) TearDownTest(c *C) {
         t.tests.TearDownTest(c)
         t.srv.stopServer(c)
         t.LoggingSuite.TearDownTest(c)
 }
 
 func (t *localNonUSEastSuite) TestPutBucket(c *C) {
-        p := t.env.PublicStorage().(ec2.Storage)
+        p := ec2.WritablePublicStorage(t.env).(ec2.Storage)
         for i := 0; i < 5; i++ {
                 p.ResetMadeBucket()
                 var buf bytes.Buffer
                 err := p.Put("test-file", &buf, 0)
                 c.Assert(err, IsNil)
         }
 }