Created two new helper functions to create a `cli.Context` with and without a
`cli.App`.
Calling these functions simplifies a lot of test code.
Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>
Many cli and arch files were using the 'older style' fairly full
Apache license text. The project standard is the shorter SPDX style.
Convert them over.
Fixes: #225
Signed-off-by: Graham whaley <graham.whaley@intel.com>