rename of the template slapos.cfg.in to respect the standards

vars for the jinja are now all declared in the [slaprunner section]

to choose if we want to deploy the given default_sr or not at the first run

instead of a recipe

(in order to kick the recipe)

In cron format.

Revert "Update md5sum to percona-toolkit package" because it is not fixing the issue with md5 checksum

This reverts commit 03a301d5.

Do Not Push The Big Red Button.

Using new built-in feature of qemu 1.6.