Add new test scenarios

Add new Automatus test scenarios for rule file_permissions_ungroupowned
that cover recent changes - exclusion of /sysroot and addition
of /usr/lib/group as second source of group data.

linux_os/guide/system/permissions/files/file_permissions_ungroupowned/tests/group_in_usr_lib.pass.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+#
+UNOWNED_FILES=$(df --local -P | awk {'if (NR!=1) print $6'} | xargs -I '{}' find '{}' -xdev -nogroup)
+
+IFS=$"\n"
+for f in $UNOWNED_FILES; do
+	rm -f "$f"
+done
+
+touch /root/test
+chown 9999:9999 /root/test
+echo "testgroup:x:9999:" >> /usr/lib/group

linux_os/guide/system/permissions/files/file_permissions_ungroupowned/tests/unowned_in_sysroot.pass.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+#
+# remediation = none
+
+UNOWNED_FILES=$(df --local -P | awk {'if (NR!=1) print $6'} | xargs -I '{}' find '{}' -xdev -nogroup)
+
+IFS=$"\n"
+for f in $UNOWNED_FILES; do
+	rm -f "$f"
+done
+
+mkdir /sysroot
+touch /sysroot/test
+chown 9999:9999 /sysroot/test