Increase CF_Dial_timeout to 30

The default 5 second timeout http://cli.cloudfoundry.org/en-US/cf/ causes the CF resource to timeout to pivotal web service from a concourse worker on AWS in us-east-1. This PR will bump up the default a bit.

out/cloud_foundry.go

@@ -79,6 +79,6 @@ func (cf *CloudFoundry) cf(args ...string) *exec.Cmd {
 	cmd.Stdout = os.Stderr
 	cmd.Stderr = os.Stderr
 	cmd.Env = append(os.Environ(), "CF_COLOR=true")
-
+	cmd.Env = append(os.Environ(), "CF_DIAL_TIMEOUT=30")
 	return cmd
 }