Calling makeModuleSetUpAndTestCaseClass results already with preparing some
environment and also test classes will run the promises, so they would never
execute test_kvm_sanity_check.

So create a method sanityCheck to check the environment and depending of the
result call or not makeModuleSetUpAndTestCaseClass and skipIf test cases
when environment is not sane enough.

Also drop now needless etc/promise directory.

As possible cover promises in tests.

Assert that machine running tests is good enough for KVM tests.

monitor-boostrap.pid existence is unpredictible.