Change all_native_events test to create an eventset for each native event it finds. Also becomes a good test of the number of outstanding eventsets allowed.
Change all_native_events test to create an eventset for each native event it finds.
Also becomes a good test of the number of outstanding eventsets allowed.

arm-hpc/papi,arm-hpc/papi,arm-hpc/papi,arm-hpc/papi,pyrovski/papi,pyrovski/papi,pyrovski/papi,pyrovski/papi,pyrovski/papi,arm-hpc/papi,arm-hpc/papi,pyrovski/papi,arm-hpc/papi,pyrovski/papi,pyrovski/papi