stack/monitor: Enable monitor password promise

This reverts commit 51a16b0b.

Now that we have IPv6-range, this promise should not spuriously fail
inside testnodes anymore due to port conflicts between the monitors
of the tested SRs and the monitor of the testnode itself, since they
all have different IPv6s now.

stack/monitor/buildout.hash.cfg

@@ -14,7 +14,7 @@
 # not need these here).
 [monitor2-template]
 filename = instance-monitor.cfg.jinja2.in
-md5sum = dda9b2355134517dae601cc20709685a
+md5sum = 3850140a4e61349cc64fa924ce410803
 
 [monitor-httpd-conf]
 _update_hash_filename_ = templates/monitor-httpd.conf.in

stack/monitor/instance-monitor.cfg.jinja2.in

@@ -423,9 +423,7 @@ depends =
   ${ca-monitor-httpd-service:wrapper-path}
   ${monitor-httpd-promise:name}
   ${monitor-frontend-promise:name}
-# XXX this is not enabled yet because this conflicts with testnode's own
-# monitoring.
-#  ${check-monitor-password-promise:name}
+  ${check-monitor-password-promise:name}
   ${monitor-bootstrap-promise:name}
   ${monitor-symlink:recipe}
   ${promise-check-slapgrid:recipe}