Disable flakey TestClientSetsTLSServerName

Signed-off-by: John Howard <jhoward@microsoft.com>

integration-cli/docker_cli_sni_test.go

@@ -14,6 +14,7 @@ import (
 )
 
 func (s *DockerSuite) TestClientSetsTLSServerName(c *check.C) {
+	c.Skip("Flakey test")
 	// there may be more than one hit to the server for each registry request
 	serverNameReceived := []string{}
 	var serverName string