Remove non-functional cleanup code from test_case() and test_case_root().
It had no effect because RUMP_SOCKETS_LIST is not set in the shell
running the cleanup phase. Even if RUMP_SOCKETS_LIST had been set,
the code would still not have worked correctly because it ran
rump.halt via "atf_check -s exit:1", which would cause the first
successful halting of a rump processes to be treated as a failure
and abort the cleanup without halting any other rump processes still
running.

Remove unused function rump_shutdown()

Incrase timeout for the benefit of the walk_list_user test case which
sometimes times out under qemu under Linux, where the timing is more
accurate than under qemu under NetBSD where the the 60 second timeout
typically takes more than 60 seconds to trigger.

branches: 1.2.8;
Slow hardware needs longer, especially for default_deny_user_big

branches: 1.1.4; 1.1.8;
Make parts of the quota tests useable for more than quotas:
- rename h_quota2_server to h_ffs_server, there's nothing about quotas
in there.
- extract non-quota parts of quotas_common.sh to ffs_common.sh

Remove unused function rump_shutdown()

Incrase timeout for the benefit of the walk_list_user test case which
sometimes times out under qemu under Linux, where the timing is more
accurate than under qemu under NetBSD where the the 60 second timeout
typically takes more than 60 seconds to trigger.

branches: 1.2.8;
Slow hardware needs longer, especially for default_deny_user_big

branches: 1.1.4; 1.1.8;
Make parts of the quota tests useable for more than quotas:
- rename h_quota2_server to h_ffs_server, there's nothing about quotas
in there.
- extract non-quota parts of quotas_common.sh to ffs_common.sh

Incrase timeout for the benefit of the walk_list_user test case which
sometimes times out under qemu under Linux, where the timing is more
accurate than under qemu under NetBSD where the the 60 second timeout
typically takes more than 60 seconds to trigger.

branches: 1.2.8;
Slow hardware needs longer, especially for default_deny_user_big

branches: 1.1.4; 1.1.8;
Make parts of the quota tests useable for more than quotas:
- rename h_quota2_server to h_ffs_server, there's nothing about quotas
in there.
- extract non-quota parts of quotas_common.sh to ffs_common.sh