Factor test partitions formatting into a separate method to facilitate
customising the formating step in tests that need to do so.

Now that `StandaloneSlapOS.format` calls `slapos node format`, remove
redundant operations in `StandaloneSlapOS.format`, such as updating
the slapproxy.

Always put IPv4 before IPv6 in partition address list, because that's
the existing order and some things rely on that order, such as tests.

A nice example of Hyrum's law in effect.

	linux-vdso.so.1 (0x00007ffca2156000)
	foo.so => not found

ssh-keysign is not readable by everyone so we cannot do "ldd" on it:

$ ls -al /opt/slapgrid/shared/openssh/f79ee5e4e4573183783541f2ad9133e8/libexec/
total 1332
dr-xr-x--- 2 slapsoft slapsoft     90 Jul 12 22:10 .
dr-xr-x--- 7 slapsoft slapsoft    131 Jul 12 22:10 ..
-r-xr-xr-x 1 slapsoft slapsoft 145560 Jul 12 22:10 sftp-server
-r-x--x--x 1 slapsoft slapsoft 506208 Jul 12 22:10 ssh-keysign
-r-xr-xr-x 1 slapsoft slapsoft 366736 Jul 12 22:10 ssh-pkcs11-helper
-r-xr-xr-x 1 slapsoft slapsoft 338064 Jul 12 22:10 ssh-sk-helper

we can have a case where written slapos.cfg has "partition_amount = 10"
(leftover from previous execution) and we call format(0), in this case,
we really want slapos.cfg function to be rewritten.

See merge request nexedi/slapos.core!557

See merge request !555

   It constains external JS files not that compatible with JS Lint.

   Move gadget into portal_skin to reuse code to render forms like we do for normal user.

See merge request nexedi/slapos.core!553

   This gives same visual/information as user has

   Those gadgets should be reusable via older erp5 ui and oss website.

  Try to compute status like the user view. It makes things easier for the administrator if he can also have the same set of messages and information to debug.

   Otherwise save the form may check security on the object listed

The output of slapos commands has been observed to be truncated earlier
than desired in some cases due to long promise messages in output of
slapos node instance and long paths included in the logs.

See merge request nexedi/slapos.core!551

See merge request nexedi/slapos.core!550

See merge request nexedi/slapos.core!549

   Now we only have a single div (status) rather them two.

    The secondary element is not that useful in reality, since it eventually contains something failing and tickets provides an way better overview of the problem.

   Also create a testing ERP5 Software Release

See merge request nexedi/slapos.core!538

Promise launcher compares current slapgrid version with an old version
number to determine if some feature is supported or if it should use a
legacy workaround. But the comparison was a simple lexicographic order
string comparison, and now that we incremented from 1.9.3 to 1.10.0 it
wrongly compared the versions. Fix it with pkg_resources.parse_version.