make reauth test compat with tailscale head (#2167)

* make reauth test compat with tailscale head

tailscale/tailscale@1eaad7d broke our reauth test as it makes the client
retry with https/443 if it reconnects within 2 minutes.

This commit fixes this by running the test as a two part,
- with https, to confirm instant reconnect works
- with http, and a 3 min wait, to check that it work without.

The change is not a general consern as headscale in prod is ran
with https.

Updates #2164

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

* sort test for stable order

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

---------

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

hscontrol/db/preauth_keys_test.go

@@ -1,6 +1,7 @@
 package db
 
 import (
+	"sort"
 	"time"
 
 	"github.com/juanfont/headscale/hscontrol/types"
@@ -169,5 +170,7 @@ func (*Suite) TestPreAuthKeyACLTags(c *check.C) {
 
 	listedPaks, err := db.ListPreAuthKeys("test8")
 	c.Assert(err, check.IsNil)
-	c.Assert(listedPaks[0].Proto().GetAclTags(), check.DeepEquals, tags)
+	gotTags := listedPaks[0].Proto().GetAclTags()
+	sort.Sort(sort.StringSlice(gotTags))
+	c.Assert(gotTags, check.DeepEquals, tags)
 }