Remove StatsDicTestCase from test_resource_tracker
Remove StatsDicTestCase from test_resource_tracker

The StatsDictTestCase in test_resource_tracker.py was supposed to be
verifying that the "stats" dict field on the ComputeNode object was
being populated with some keys like num_instances,
num_proj_{project_uuid), etc. Unfortunately, all this test was really
asserting was that the behaviour of the ComputeNode object when
saving/setting the stats dict converted the values from integers to
strings.

The *actual* setting of real values of stats information is already
being fully tested with unit tests that are readable and cover all
variations of the stats keys in test_tracker.TestInstanceClaim's
methods, so we remove the StatsDictTestCase from
test_resource_tracker.py.

Change-Id: Ief658c0da2503b8e9905f5da2dd4c667a3fce550

cloudbase/nova,openstack/nova,jianghuaw/nova,cloudbase/nova,jianghuaw/nova,mahak/nova,sebrandon1/nova,rajalokan/nova,Juniper/nova,gooddata/openstack-nova,Juniper/nova,openstack/nova,mahak/nova,alaski/nova,bigswitch/nova,rajalokan/nova,sebrandon1/nova,bigswitch/nova,phenoxim/nova,klmitch/nova,gooddata/openstack-nova,vmturbo/nova,rahulunair/nova,rahulunair/nova,mikalstill/nova,gooddata/openstack-nova,vmturbo/nova,phenoxim/nova,rajalokan/nova,jianghuaw/nova,mahak/nova,klmitch/nova,klmitch/nova,mikalstill/nova,alaski/nova,vmturbo/nova,hanlind/nova,sebrandon1/nova,klmitch/nova,Juniper/nova,rahulunair/nova,hanlind/nova,openstack/nova,gooddata/openstack-nova,jianghuaw/nova,rajalokan/nova,vmturbo/nova,cloudbase/nova,hanlind/nova,mikalstill/nova,Juniper/nova