Remove service crud from test_resource_tracker
Remove service crud from test_resource_tracker

The Service object is no longer coupled with the ComputeNode object and
is not used in the resource tracker at all. test_resource_tracker.py was
still creating a service entry in its setUp() and mocking out
service-related stuff, so we remove that.

Change-Id: I83bf0253c92f318cbc782aee4e6f411925b6a7af

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