Update jenkinsfile to use Jsoup for Camunda deployment rather than mix curl commands

[StephenOTT]

https://jenkins.io/doc/book/pipeline/shared-libraries/#using-third-party-libraries

@Grab('org.apache.commons:commons-math3:3.4.1')
import org.apache.commons.math3.primes.Primes
void parallelize(int count) {
  if (!Primes.isPrime(count)) {
    error "${count} was not prime"
  }
  // …
}