Pin ERP5 revision and slapos.cookbook

Remove slapos.recipe.build from stack/erp5/buildout.cfg because is already defined in stack/slapos.cfg
Put back ERP5 and slapos.cookbook in development mode
slapos-testing: remove jio and officejs tests.
pbs: fixed '==' in bash code
fixup! slapos-testing: remove jio and officejs tests.
removed unused bully script - resilience now simpler and faster.
slapos.cookbook 0.90
resilience: use slapos.cookbook 0.90 (to avoid double request)
stack/lapp: unpick rdiff-backup, already picked by stack/resilient
fixup! slapos-testing: remove jio and officejs tests.
fixed pbs test
version up : groonga 4.0.7 and mroonga 4.07.