Move shared logic to base scenario test class

The ShareBasicOpsBase class contained setup logic which should be
reused in other tests. This code is moved up to ShareScenarioTest.
Additionally setup checks are moved up to avoid unnecessarily creating
resources, and some naming changes have been made for clarity.

Change-Id: Ia7db48ae0ecab7a11b1d724b6ca71015ee675aea
2 files changed