check-mirroring: Move some prints to be conditional on "verbose".

(imported from commit 90db591f5fc3e4d1f830ed16bca9380a3a9dddd3)

bots/check-mirroring

@@ -68,6 +68,7 @@ if child_pid == 0:
             "content": str(hzkey2),
             "stream": "tabbott-nagios-test",
             });
+    if options.verbose:
         print "Sent Humbug messages!"
     time.sleep(0.5)
 
@@ -85,6 +86,7 @@ if child_pid == 0:
                           cls="tabbott-nagios-test", instance="test")
     zeph.setmessage("%s\0%s" % (zsig, zhkey2))
     zeph.send()
+    if options.verbose:
         print "Sent Zephyr messages!"
 
 
@@ -99,6 +101,7 @@ else:
     max_message_id = humbug_client.get_profile()['max_message_id']
 
     time.sleep(10)
+    if options.verbose:
         print "Receiving messages!"
     notices = []
     while True: