Reduced the garbage collection frequency in runtests.py.
Reduced the garbage collection frequency in runtests.py.

dsanders11/django,auvipy/django,MarkusH/django,solarissmoke/django,rsalmaso/django,rsalmaso/django,rsalmaso/django,atul-bhouraskar/django,manhhomienbienthuy/django,freakboy3742/django,dsanders11/django,MarkusH/django,django/django,shaib/django,ghickman/django,solarissmoke/django,atul-bhouraskar/django,MarkusH/django,pauloxnet/django,auvipy/django,apollo13/django,rsalmaso/django,felixxm/django,atul-bhouraskar/django,django/django,blighj/django,freakboy3742/django,pauloxnet/django,blighj/django,ghickman/django,apollo13/django,manhhomienbienthuy/django,blighj/django,auvipy/django,monetate/django,apollo13/django,dsanders11/django,MarkusH/django,felixxm/django,auvipy/django,solarissmoke/django,freakboy3742/django,manhhomienbienthuy/django,monetate/django,atul-bhouraskar/django,shaib/django,ghickman/django,takis/django,felixxm/django,takis/django,django/django,solarissmoke/django,pauloxnet/django,dsanders11/django,shaib/django,django/django,monetate/django,pauloxnet/django,felixxm/django,blighj/django,takis/django,shaib/django,monetate/django,apollo13/django,takis/django,manhhomienbienthuy/django,ghickman/django