Replace old java-faker with kotlin-faker

[serpro69]

Replaced an old and buggy java-faker with kotlin-faker :)
Probably not much of a difference for a demo, but it's my first contribution here, so hopefully it's ok :)

Tests in event-driven-microservices-workshop module still fail, but they were failing even before this change, so I assume it's intentional, since this is a workshop code.

[ybyzek]

@serpro69 for my own education, can you please elaborate on why Kotlin Faker is a better replacement (beyond "old and buggy java-faker")?

@MichaelDrogalis from your work on https://github.com/MichaelDrogalis/voluble which uses Java Faker , do you have an opinion on this PR?

[serpro69]

Hi @ybyzek ,
kotlin faker offers more data providers, locales, and has extra "batteries" included as well - random instances of classes, unique values, etc. In addition to the above it's also faster.
You can also check some comparisons here if you're interested ;)

[rmoff]

ping @MichaelDrogalis @ybyzek for input here plz

[rmoff]

@MichaelDrogalis any thoughts on this? thanks!