project: upgrade dependencies

[ibodrov]

Main changes:

• upgrade Jetty to 12
• upgrade Jackson to 2.16.x

Issues:

• Wiremock doesn't support Jetty 12 yet, waiting for https://github.com/wiremock/wiremock/pull/2593 Tests that use Wiremock are currently disabled.
• revapi-maven-plugin detects a lot of breaking changes in concord-client2 (I think it is mostly due to Jackson changes). Disabled until the release.