add short versions of the open source license strings
add short versions of the open source license strings

These are the strings that are accepted as license options in
`chef generate cookbook -I <license>`. These short versions are also the
strings that appear in the metadata of `chef generate`'d cookbooks.

Signed-off-by: Robb Kidd <11cd4f9ba93acb67080ee4dad8d03929f9e64bf2@chef.io>

robbkidd/supermarket,robbkidd/supermarket,chef/supermarket,juliandunn/supermarket,juliandunn/supermarket,chef/supermarket,chef/supermarket,juliandunn/supermarket,nellshamrell/supermarket,robbkidd/supermarket,nellshamrell/supermarket,robbkidd/supermarket,chef/supermarket,chef/supermarket,juliandunn/supermarket,nellshamrell/supermarket,nellshamrell/supermarket