This test is to check for NSNewNSWithoutPath, i.e. "If path is not
specified, the runtime MUST create a new container namespace of the
given type"

See also opencontainers#572

Signed-off-by: Dongsu Park <[email protected]>

This test is to check for NSInheritWithoutType, i.e. "If a namespace
type is not specified in the namespaces array, the container MUST
inherit the runtime namespace of that type".

See also opencontainers#572

Signed-off-by: Dongsu Park <[email protected]>

To be able to deal with diagnostics in a general way, split out the diagnostics
handling code into a new function `pringDiag()`, which will be normally called
from the defer function's context. This way we can simplify the error handling
routines.

Signed-off-by: Dongsu Park <[email protected]>

To be able to deal with diagnostics in a general way, split out the diagnostics
handling code into a new function `pringDiag()`, which will be normally called
from the defer function's context. This way we can simplify the error handling
routines.

Signed-off-by: Dongsu Park <[email protected]>