phantomjs: update to latest version
slapos stack: use slapos.core 1.2.4.
wip for json schema
Start to test all json schema and files.
testing: start to test slapos.cookbook egg.
erp5: add erp5_configurator_ebusiness_lotse to bt5 parameter
version up : nginx 1.7.5.

also use the explicit version of nginx-dav-ext-module.
also remove too old nginx-unstable.
update : bash 4.3 patchlevel 25, including fix for CVE-2014-6271.