probe_systemdunitdependency fails when running online inside container

[rsprudencio]

How to reproduce:
Running oscap directly from a container
$ oscap xccdf eval --profile xccdf_org.ssgproject.content_profile_pci-dss /usr/share/xml/scap/ssg/content/ssg-rhel7-ds.xml

Note: this is NOT offline scanning

OpenSCAP Error: Probe at sd=8 (systemdunitdependency) reported an error: Unknown error [oval_probe_ext.c:393] Unable to receive a message from probe [oval_probe_ext.c:579] Invalid oval result type: -1. [oval_resultTest.c:179] Probe at sd=8 (systemdunitdependency) reported an error: Unknown error [oval_probe_ext.c:393] Unable to receive a message from probe [oval_probe_ext.c:579] Invalid oval result type: -1. [oval_resultTest.c:179] Probe at sd=8 (systemdunitdependency) reported an error: Unknown error [oval_probe_ext.c:393] Unable to receive a message from probe [oval_probe_ext.c:579] Invalid oval result type: -1. [oval_resultTest.c:179] Probe at sd=8 (systemdunitdependency) reported an error: Unknown error [oval_probe_ext.c:393] Unable to receive a message from probe [oval_probe_ext.c:579] Invalid oval result type: -1. [oval_resultTest.c:179] Probe at sd=6 (systemdunitdependency) reported an error: Unknown error [oval_probe_ext.c:393] Unable to receive a message from probe [oval_probe_ext.c:579] Invalid oval result type: -1. [oval_resultTest.c:179] Probe at sd=6 (systemdunitdependency) reported an error: Unknown error [oval_probe_ext.c:393] Unable to receive a message from probe [oval_probe_ext.c:579] Invalid oval result type: -1. [oval_resultTest.c:179] Probe at sd=6 (systemdunitdependency) reported an error: Unknown error [oval_probe_ext.c:393] Unable to receive a message from probe [oval_probe_ext.c:579] Invalid oval result type: -1. [oval_resultTest.c:179]

[jan-cerny]

Also reported on https://bugzilla.redhat.com/show_bug.cgi?id=1431186

[jan-cerny]

A fix is proposed in #708

[jan-cerny]

Fixed in #708.