Fix done messages and error message for ipc tests

Signed-off-by: Alexander Morozov <lk4d4@docker.com>
Rewrite TestRunNetHost to compare namespaces

Signed-off-by: Alexander Morozov <lk4d4@docker.com>
Merge pull request #9847 from LK4D4/fix_net_host_test

Fix net host test