OXAppSuiteJM.scala: use different signature for mail?action=new call, see https://bugs.open-xchange.com/show_bug.cgi?id=35683

Minor changes reflecting things learned at a customer, and work in progress regarding copying mails

OXAppSuiteJM.scala: Improvements; now matches the JMeter profile "Main Thread WebUI" neary fully, and also includes an account filler chain

Furthermore added UpdateTaskRequest and DeleteTaskRequest and a small perl script that can create JMeter-style aggregate.csv file from the js/stats.js file

Added a script OXAppSuiteJM.scala which is the migrated JMeter profile "OXAppSuite.jmx" (the WebUI Main Thread group of it).

Missing is the "copy 3 mails" step since the corresponding scala logic of json parsing and constructing is yet missing.

Added some RequestParameters to the class of the same name, and added some Requests to the API classes.

This reverts commit 75b06548.