ioc_launcher and iocstartup: remove logic duplication

The ProcServLauncher in ioc_launcher in the test framework duplicates some of the logic done in build_ioc_startups and written into procserv.bat, in particular it reconstructs the procServ line itself. This logic should be put into one place, this will probably require a change to build_ioc_stratups. Currently procserv.bat is a big list of all procServ commands, this should be separated into a single generic procserv ioc function and multiple calls to this, teh separated procserv file can then be used by the test framework