Install pbr egg before installing cliff egg.
hello-world: add IP examples
slaprunner: After restauration script

This permits invoke custom code after copy the instance to the right location [Working in progress for better restauration]
slaprunner: Accept custom exclude file to optimize backup.
slaprunner: concatenate exporter.exclude file of each partition of the runner and write it in the standard location.

Allow to exclude things from inside of the runner's partitions without knowing what instance it is.
slaprunner: importer script: use variables.

Allow to lint/edit/develop more easily the bash script without having tons of template parameters.
slapruner: Add support for script to run after resiliency import (one script per partition)
webrunner: add custom monitor script to monitor all promises of subinstances.
slaprunner: add home directory reference.

Allows HOME to be easily referenced in some cases where buildout:directory is not available.
slaprunner: Make importer script process instances before running after-import subscripts.

Import script of webrunner asks stop of all instances, runs slapos, runs
consistency checks, runs scripts, ask start of all instances.
Webunner: Make import script report in a file if import / afterimport was ok

+ make promise checking this
hardcode.
ERP5 SR: Use mariadb backup from erp5-cluster.

Side effect: activate binlogs.
current backup system does not work.
erp5: add resiliency exclude files.
erp5: add webrunner resiliency after-import (restore) scripts.