Add functionality to wrapper to ask for an exclusive CPU core.

/reviewed-on !184

/reviewed-on !166

Buildout commit in discussion:  slapos.buildout@43839169

/reviewed-on !176

It was not working with wrappers to work around shebang length limitation.

  If the password file is overwriten by a third part application,
  an wrong n can be added to the file. The change on this recipe
  allow us automatically fix this miss behaviour.

  * db-path was removed from command parameter
  * Only a single command is generated now, instead several wrappers.
  * Wrapper to registry is not generated from recipe anymore, it is geneated by a normal section.

Otherwise, performances get awful on HDD, and not far better on SSD.

  This commit is a clean up, it don't change anything for the final behaviour.

 Bang on every update is not reliable.

 Now the script on cron contacts re6st registry to collect informations and
 the script itself parameters of the slaves. This will reduce the load in
 and speed up the update of the slave on slapos master.

  * Follow up methods changes on re6stnet registry API.
  * getIPv4Information was simplifed on registry, so reimplement it.
  * Remove scripts generated and keep a single script to orchestate the token management.
  * Drop some code duplication
  * Remove babeld, openvpn and miniupnp as they are not required.
  * Remove useless scripts.
  * Remove re6stnet section, extra-eggs is more them enough and prevent duplications.

It sometimes happend that buildout unistall/install the section with this recipe,
which remore storage_path file and recreate it. In most of cases this is not wanted
because the recipe is used to generate password, so that password will change when this
happend.
To prevent buildout to remove storage_path, I introduced a new option 'create-once'
which, when set to True (the default value) will not let buildout play with storage_path file
by returning None in install recipe. Also install won't remove the file if the size is not 0.

/reviewed-on !129

Also allow to change promise timeout by editing check_url_PROMISE_TIMEOUT file

No need to parse. This fixes several issues:
- key comments were messing up everything
- sometimes keys were repeated
- no way to remove key

The 'pidfile' parameter is passed to 'createWrapper' method in order to
avoid concurrent calls.

Instead, of that, the notifier wrappers will run the scripts several more times in case of failures
This is better than silent failures.

Instead, of that, the notifier wrappers will run the scripts several more times in case of failures
This is better than silent failures.

*  Includes a new recipe to get a random time
*  Moves generatepassword and generatemac into random.py
*  Fixes up some recipe, as the creation of a "random.py" file may collide
   with the import of the standard library random

This reverts commit 2b0c61d9.

Reading the .installed.cfg file is not the correct way of storing values. The publish_early
recipe should be used instead

This reverts commit 8787716d.