containers: added timeouting for all netns test cases FIFO operations

In certain situations (failing to start sshd or pinging parent
namespace) there was a possibility of deadlock in a communication
over named pipes in network namespaces tests.

All test cases in netns/ directory now use tst_timeout
for timeouting all FIFO operations to prevent possible deadlocks.

Signed-off-by: Matus Marhefka <mmarhefk@redhat.com>
15 files changed