Create final release v10 of MySQL

-New packages include route_registrar for HAProxy and gra-log-purger for
the mysql job.

[#76025614]
extra comma was invalid json
Update README for v10
Use https instead of ssh url since people prefer it

You don't have to have working ssh keys to run ./update
Fixes mariadb_ctrl unit tests
Improve REAME instructions for creating stubs

- Created sample stubs in templates

[#75861660]
Fix README after faulty push

[#75861660]
Fix bad link to bosh lite make_manifest_spiff_mysql script

[#75861660]