Conflicts:
	slapos/format.py
	slapos/tests/slapformat.py

  This raise my lead to a significant change on the API, which
  may require to refactor several tests, to this change keep s a
  backward compatible API.

- configurable manager list via slapos.cfg
- XML serialization now ommits all private fields

Conflicts:
	slapos/tests/slapformat.py

This reverts commit 889711ed

This approach to solve checking of commands by logging is wrong. It can lead to malicious commands being executed so this test is no longer reliable.

We just should not test issued commands - test should use an isolated environment and then inspect the impact.

/reviewed-on nexedi/slapos.core!15

Conflicts:
	slapos/tests/slapformat.py

Conflicts:
	slapos/format.py

Fix parameters order to use request()

/cc @rafael @alain.takoudjou 

/reviewed-on nexedi/slapos.core!13

When creating a TAP interface we try to add it to a bridge no mater what kind of the external interface is. Check whether it is a bridge first.

/reviewed-on nexedi/slapos.core!12

slapos/cli/entry.py, slapos/cli/format.py, slapos/format.py: Do not double the log output when "slapos node boot" failed.

Pre-check if the instance is allocated before check if it was allocated on the right place. This problem seems unreproducible on a running instance.

This is a follow up on the API change from the upgrade of facebook-sdk egg from version 0.4.0 to version 2.0.0.

On the version 0.4.0, the GraphAPI was implemented on v2.2 which is not supported anymore by facebook. With this commit we move to use GraphAPI on version v2.7.

This should reduce (significantly) the number of activities launched while searching for documents to process.

If the software installation is not deployed in 12 hours, this alarm will generate a ticket to the computer owner take action.

Initial release of the code of frontend selector demo available at http://demoapp.node.grandenet.cn