[galaxy-dev] Fixed Thread number in certain tools

Hello, For certain tools, like bwa or blast, there is a non-configurable number of threads to use inside the tool xml. This is inconvenient for certain cluster configurations, where what we want is division of a job into multiple jobs (I guess this is what is intended by the <parallel> tag), and not creation of threads that may wreak havoc in a cluster. Is there any reason why bwa and blast have --num-threads=8 pre-configured in the xml file? Thanks, Daniel