What would you like to be added:

Use mockSchedulerCache return by NewDefaultMockSchedulerCache in PR #3269

Why is this needed:

1. simplify the code in UT
2. fixes some UTs which doesn't run actually

Plan to enhance UTs

• 1. support mockSchedulerCache, have done in add mock cache for ut and performance test #3269
• 2. Unify the UT validation process by defining a UT test struct, which include all resource need to do test, such as pg, pods, nodes, queues, and expect results for binding, pipelined, evicted.
  • 2.1 define a CommonStruct, a init func to load conf, and a func runTest to do test and validation
  • 2.2 rewrite each package's UT

Finaly, in future commiter only need to concern about UT design when submit a pr