Some of the attributes that PTL adds by default are necessary for seamless test execution. One of these is 'vntype', which PTL sets by default so that the same set of tests can run on a Cray, as they do on a normal Linux box. We should find out if there are any other such attributes and figure out how to deal with them.
So, this sub-task can be done as follows:
create a list of all the attributes which are set by default by PTL
Analyze the list and find out which ones are problematic