Setting the assignee from the _first_ cc: user (if found)

Jira permissions must be valid (sender must have Assign Issues), assignee must have Assignable User

if (relatedIssue === null) {
  //so for create only
  if (ccAddresses.length>0) {
      //determine is email address is a jira user.
      var emailAddress = ccAddresses[0].getAddress();
      print("[" + emailAddress + "] detected email address");
      var jiraUser = jemhUtils.getUserByEmail(emailAddress);
      if(jiraUser == null)
      {
          print("["+ emailAddress + "] was not an email address related to a Jira User");
      }
      else
      {
        print("making "+jiraUser.getUsername()+" the assignee");
        resultMap.put("assignee", jiraUser.getUsername());
      }
  }
}