CDAP-611: Ported Netlens app to use Services instead of Procedures

@ParthGandhi this RP contains all changes described in https://github.com/caskdata/cdap-apps/pull/39 + fixes according to PR comments
we don't have that artifact in public central. So unless you add ass sonatype repo to pom - it will not work.
```
    <repository>
      <id>sonatype</id>
      <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
    </repository>
```