[master] Revert "[master] tag initializing keys so they can't be used for normal validation"

This reverts commit 560d8b833e.

This change created a potential race between key refresh queries and
root zone priming queries which could leave the root name servers in
the bad-server cache.

bin/tests/system/mkeys/README

@@ -16,8 +16,16 @@ is used so it will send TAT queries once per second.
 
 ns3 is a validator with a broken key in managed-keys.
 
-ns4 is a validator with a deliberately broken managed-keys.bind and
-managed-keys.jnl, causing RFC 5011 initialization to fail.
+Tests TODO:
 
-ns5 is a validator which is prevented from getting a response from the
-root server, causing key refresh queries to fail.
+- initial working KSK
+
+TODO: test using delv with new trusted key too
+
+- introduce a REVOKE bit
+
+- later remove a signature
+
+- corrupt a signature
+
+TODO: also same things with dlv auto updates of trust anchor