Inspired by build-rina style.

This reverts commit df51573f.

Unfortunately, the test system shall not rely on IPv6 connectivity of
the VM. Other way to get data from the instance shall be explored.

Now the testing partition is able to fetch data from tested VM, by using
its public ipv6 address, to which the VM can post results.

This is first step of reusing KVM SR with own instance configuration.

This is backup commit

This fixes a regression introduced in
commit aa5aa9e8.

plugin-load loads plugins in the given order and stops (without exiting)
on the first one that is missing. ha_rocksdb must be listed last because it's
only there when using experimental MariaDB 10.2

This reverts commit 6902a67f.

Signed-off-by: Julien Muchembled <jm@nexedi.com>

software/erp5 & stack/erp5: Add a new parameter wendelin-core-zblk-fmt. Use it to specify wendelin.core format(ZBlk0 or ZBlk1).