Wait longer for Zezere provision request to go through

30 seconds doesn't seem to be reliable enough. Let's try 60, if
that's not enough I'll try and think of something smarter.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

tests/_iot_zezere_remote.pm

@@ -43,7 +43,7 @@ sub run {
     # exit
     quit_firefox;
     # wait for the provision request to go through
-    sleep 30;
+    sleep 60;
     # ssh into iot host and create key file
     assert_script_run 'ssh -o StrictHostKeyChecking=no root@172.16.2.119 touch /tmp/zezerekeyfile';
 }