Make the comma optional in the Kaazing code.quality standard to cover gateway and other projects

Kaazing has newer projects (e.g. nuklei) and older products (e.g. gateway.server) that differ in whether or not a comma is required in the copyright header in each file.  By making the comma optional (no legal need to have it), we naturally support both comma and comma-less copyright headers.

I can see an argument that to avoid mixed commas and no-commas within one project, we should pick a way and stick with it.  However, I think the only time anyone edits these things after creation is to change years, so the risk of in-consistent headers within one project is very low.  This lets us get going with all the open-source repositories in a flexible way.