Make sure we always allow weak enctypes in MIT HDB test

Also, we still try to create the version key in the MIT HDB, so we
    might as well update the test DB to have the version key already
    there.  (But really, we should just never write to the MIT HDB.)

tests/kdc/krb5-hdb-mitdb.conf.in

@@ -1,7 +1,7 @@
 [libdefaults]
 	default_realm = TEST.H5L.SE TEST2.H5L.SE
 	no-addresses = TRUE
-	allow_weak_crypto = @WEAK@
+	allow_weak_crypto = TRUE
 
 [appdefaults]
 	pkinit_anchors = FILE:@srcdir@/../../lib/hx509/data/ca.crt