Use webapp artifacts for examples and tests

[gregw]

Lots of tests and examples are using relative paths to find webapps and keystores to run/test against. Examples include:

• OneWebApp
• ManyConnectors
• AsyncRestServer

This is fragile and dependent on working directory, IDEs etc.

Instead, we should import webapps as maven artifacts and install them in a known location in target.

[gregw]

@olamy this feels like something you could tackle?

[olamy]

@gregw yup for sure.

[olamy]

starting working on it and found few examples broken/not maintained :)

[olamy]

depends on #3138

[stale]

This issue has been automatically marked as stale because it has been a full year without activity. It will be closed if no further activity occurs. Thank you for your contributions.

[olamy]

definitely todo

[joakime]

This was addressed in multiple commits.
First introduced with 862e6d0
Finished up in PR #4056