auto-t: fix unreliable behavior in testPSK-roam

The packet loss test had a few problems. First being that the RSSI for
the original BSS was not low enough to change the rank. This meant any
roam was just lucky that the intended BSS was first in the results.

The second problem is timing related, and only happens on UML. Disabling
the rules after the roaming condition sometimes allows IWD to fully
roam and connect before the next state change checks.

autotests/testPSK-roam/connection_test.py

@@ -55,16 +55,16 @@ class Test(unittest.TestCase):
         condition = 'obj.state == DeviceState.roaming'
         wd.wait_for_object_condition(device, condition)
 
-        if pkt_loss:
-            self.rule1.enabled = False
-            self.rule2.enabled = False
-
         # Check that iwd is on BSS 1 once out of roaming state and doesn't
         # go through 'disconnected', 'autoconnect', 'connecting' in between
         from_condition = 'obj.state == DeviceState.roaming'
         to_condition = 'obj.state == DeviceState.connected'
         wd.wait_for_object_change(device, from_condition, to_condition)
 
+        if pkt_loss:
+            self.rule1.enabled = False
+            self.rule2.enabled = False
+
         self.bss_hostapd[1].wait_for_event('AP-STA-CONNECTED %s' % device.address)
 
         testutil.test_iface_operstate(device.name)
@@ -197,7 +197,7 @@ class Test(unittest.TestCase):
 
         cls.rule2 = hwsim.rules.create()
         cls.rule2.source = rad0.addresses[0]
-        cls.rule2.signal = -4000
+        cls.rule2.signal = -7000
 
         # Set interface addresses to those expected by hostapd config files
         os.system('ip link set dev "' + cls.bss_hostapd[0].ifname + '" down')