test/cfgfile: replace license text with SPDX tag
test/cfgfile: replace license text with SPDX tag

Replacing full license text with SPDX tag.

Signed-off-by: Allain Legacy <cf9f8e06ab4540486643794deada051d3a16b292@windriver.com>
Acked-by: Stephen Hemminger <06fa905d7f2aaced6dc72e9511c71a2a51e8aead@networkplumber.org>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk