hosts-dict alone is not powerful enough: in some cases, we want to alias a
foreign hostname in order to control access to it (ex: to make interface
calls fail on a clone).

Conflicts:
	stack/erp5/buildout.cfg
	stack/erp5/instance-erp5-cluster.cfg.in
	stack/erp5/instance-mariadb.cfg.in
	stack/erp5/instance-tidstorage.cfg.in
	stack/erp5/instance.cfg.in

Also deploy takeover script only in import instances. This is non-sense to deploy it on export/pbs instances.

It will be used by equeue to prevent to run import scripts if detected.
Reason: if an import script is run AFTER takeover has been done, it may be stopped during its execution while slapgrid is run, causing the new-main instance not to behave correclty.