tasks #7473: not allowing replication until content is migrated

Change-Id: I710a63737c30c62fc8c081181b0391667843021f
Merge commit 'refs/changes/42/3042/3' of ssh://gerrit.tuleap.net:29418/tuleap into tuleap-stable-master

* ssh://gerrit.tuleap.net:29418/tuleap:
  tasks #7473: not allowing replication until content is migrated

Change-Id: Ibd83e1963204b4fb2ecf52d7836b55040b42a612
Tuleap 7.5.99.19

Change-Id: I9500519000a181b76d801d933a212ff601f5dd47