performance_test_machine filter doesn't apply early enough

[Emily Bache]

if I only want to collect performance data on certain machines, I should be able to filter with:

[performance_test_machine]
default:slave*
[end]

Unfortunately this doesn't prevent texttest from attempting to collect performance data on all machines. The filter by machine only applys later in the process after the test as run. This is rather inconvenient when I'm running on one of the machines where I don't want performance data, and "time -o" dosn't work.

I'd like texttest to not call my program with "time -o" unless it's one of the performance test machines as defined in the config file.

[Geoff Bache (geoff.bache)]

Pushed a fix for this now, please retest.