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.

In case of erp5testnode, we have only one IP. So slapos node instance on clone instance would reach... slapproxy of main slaprunner.

Most important change: revert back develop to false by default in gitclone.