In hermetic test, add additional test cases and move k8sClient object creation so it's called once for all tests (#278)

* Add 2 new test cases to hermetic integration test. Move k8sclient API setup to BeforeSuit() so it is set up once for all test cases. Add getter function to scheduling to reference queue threshold for lora affinity inside integration tests.

* remove vestigial unit test from hermetic test, minor change to comments, remove unreachable error check.

* Add test-case for sheddable that is not shed, fix nits and rename the non-lora test case to use a different model name.

* Fix small typo.

Author: BenjaminBraunDev