placement: correct improper test case inheritance
placement: correct improper test case inheritance

nova/tests/unit/scheduler/client/test_report.py had a bunch of tests in
a base test class instead of just the setUp(). This resulted in
re-running a whole bunch of tests unnecessarily.

Before:

Ran: 61 tests in 35.0000 sec.
- Passed: 61
- Skipped: 0
- Expected Fail: 0
- Unexpected Success: 0
- Failed: 0
Sum of execute time for each test: 11.8261 sec.

after:

Ran: 35 tests in 35.0000 sec.
- Passed: 35
- Skipped: 0
- Expected Fail: 0
- Unexpected Success: 0
- Failed: 0
Sum of execute time for each test: 5.0003 sec.

Same test content and coverage, just not re-running tests unnecessarily.

Change-Id: Icbdf8dd4e221259fd4a2683cb12cc26dc87733bd

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