Fix 77bc6c75

Also use this code in test.

It will be used during allocation.

Allow to add new networks. Allow to associate Computer into networks. Allow to
see list of Computers in network.

Each iteration (each partition) of main CP loop has sanity checks and makes sure nothing raises outside.

This reverts commit aa0ba0cf.

Sometimes, git default merge strategy is really dumb. Or it may be me.

Conflicts:
	slapos/grid/slapgrid.py

If partition is not processed correctly, it's good to know what instance it is.

Add tests to ensure master is not called when using common Computer methods with empty computer_guid

Just doing it by factoring code.

It should not take to much time to start allocation on this computer

Use the capacity_scope category on computer to desactivate everything.
The alarm is now able to open/close the allocation.

It now checks: edit workflow, access log and capacity usage.

Respond immediately with no data in case of no cached information and register
cache filling.

In case if data are available, but older then 5 minutes, request its
recalculation.