Page "Create a Confluence 'Hello World' macro" needs to be updated

Issue Summary

Page Create a Confluence 'Hello World' macro needs to be updated since we can find the following information as out-of-date or lacking further details:

1) Uses an old version of the SDK (6.2.x versus the current 8.2.x).

2) There is no warning that you can only use a version of Java less than 255.

3) The command atlas-create-confluence-plugin asks an additional question (Use OSGi Java Config:?) which is not documented and should be listed.

4) Seemingly the use of scanner and spring framework has changed. Causing many compile errors when trying the "Format the macro appearance using CSS" section of the tutorial. Causing admins to search for a solution outside of the page instructions.

Having this situation in mind, it would be necessary for a page review and update to reflect today's usage and to make it easier to keep up with the necessary steps to fulfill the macro creation.