echo 1.575.2

refactor(core): Clean up echo-pipelinetriggers dependencies (#373)

Reduce transitive dependencies in echo-pipelinetriggers by
explicitly specifying dependencies, and remove any unused
dependencies.

Explicitly include the following, which were transitively
included before:
* echo-model
* korkArtifacts
* jacksonDatabind
* springContext
* commons-lang (pull in lang3, and update calls from lang)

Remove the following, which are not needed:
* guava (unused)
* okHttp (part of retrofitDefault group)
* eurekaClient (unused)
* groovy (only in test module now and included in test group)
* spock (included in test group)

Update two other modules to explicitly pull in logstashEncoder
as they were transitively depending on it being in echo-pipelinetriggers