Merge branch 'issue/18' into 'development'

.gitlab-ci.yml

include/agent/get_bios_date.h

include/agent/get_machine.h

include/agent/get_motherboard.h

include/agent/inventory.h

src/agent/get_bios_date.cpp

src/agent/get_machine.cpp

src/agent/get_motherboard.cpp

src/agent/inventory.cpp

test/returnTest.bats