Fix mismatch between log messages and behavior of libpod.LabelVolumePath.

A reading of LabelVolumePath suggests that the intended behavior
upon encountering ENOTSUP is to log the issue and continue without
error, while all other errors in the Relabeling operation should
be considered errors of LabelVolumePath and passed up accordingly.

This is not the behavior that is encountered, as this test shows:
it is instead considered an error if and only if the Relabeling
operation returns ENOTSUP, spitting out a somewhat incongruous
error message, while all other error types that may be returned
are logged without being propogated, with an even more incongruous
error message saying that the operation was not supported.

The comparison was changed to match the behavior documented by the
log messages, and a test was added that will simulate executing
this function on a path where the mounted filesystem does not
support SELinux labels, with the assertion that the function should
not return an error in order to highlight the condition these
changes seek to alleviate.

Signed-off-by: Peter <peter@psanders.me>

0 files changed, 0 insertions, 0 deletions