Fixes #82 #83

Moved eureka and archiaus integration to respective modules.
Provided an attribute in `@KaryonBootstrap` to specify the HealthCheckHandler implementation.
Leveraging RxNetty's request processing pool for jersey.

Since Jersey 1.x is a blocking API, we can not run it directly in the eventloop.

This change, hands off the request processing in a different event executor with configurable threads.
Removing mavenLocal() for builds.

Maven local repo can cause issues when the local repo is corrupted.

 This becomes really difficult to get over on our CI server: cloudbees.
Merge pull request #84 from NiteshKant/master

Fixes #82 #83