[extension] support property ordering in @ConfigurationProperty

[lburgazzoli]

This is a...

[X] Feature request
[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Documentation issue or request

The problem

The annotation @ConfigurationProperty does not support ordering so it is not possible to define the order used to display properties.

[stale]

This issue has been automatically marked as stale because it has not had any activity since 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions!

[lburgazzoli]

we should do it

[stale]

This issue has been automatically marked as stale because it has not had any activity since 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions!