nmcli steps: decode failed command output
the output is not decoded correctly in case the called process fails
(non-zero returncode), we should use .decode() instead of str().
@RunTests:alias_ifcfg_add_single_alias
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the output is not decoded correctly in case the called process fails
(non-zero returncode), we should use .decode() instead of str().
@RunTests:alias_ifcfg_add_single_alias