Changes

skeleton: Use provided copyright in feature.properties

Before:

$ ./skeleton/create_new_feature.py --copyright "ACME" my-awesome-feature
$ cat o.e.t.i.my-awesome-feature/feature.properties \
  | grep 'copyright='
copyright=[Update copyright]

After:

$ ./skeleton/create_new_feature.py --copyright "ACME" my-awesome-feature
$ cat o.e.t.i.my-awesome-feature/feature.properties \
  | grep 'copyright='
copyright=ACME

Change-Id: I1a68e1fe8c404b04e3c10c208a1b8f6a373b569b
Signed-off-by: Christophe Bedard <christophe.bedard@apex.ai>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass.incubator/org.eclipse.tracecompass.incubator/+/196375
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Tested-by: Marco Miller <marco.miller@ericsson.com>
Reviewed-by: Marco Miller <marco.miller@ericsson.com>