snap-seccomp: manually resolve socket() call in tests
In libseccomp 2.3.x the "socket" call on i386/s390x returns a
negative syscall number. This breaks our in-kernel tests. This
patch fixes this by manually resolving the syscall to the real
socket syscall (359).
It also errors now when negative syscalls are found, this should
ensure that we always test all our syscalls.
overlord: introduce Mock which enables to use Overlord.Settle for settle in many more places (#3856)
overlord.Mock creates a no-manager Overlord supporting AddManager to add a subset of managers, mainly for letting tests use Overlord.Settle even with just 1 or few managers.
Moved calling some global init code into Manager creation functions to avoid unexpected confusing side-effects on tests once they all start to import overlord which imports all managers.
This test is failing case we run with $SPREAD_BACKEND = external because
there are not snapd_*.deb files to copy. Skipping test when there are not -deb files built.
daemon, snapstate: move ensureCore from daemon/api.go into snapstate.go (#3727)
This is prereq work for auto-installing missing base snapd and missing default-provider for content snaps.
The logic to add tasks to install core is added in a 'prerequisites' task that either wait for another change to do that or adds the necessary lane to the current change.
