Update Storage Unit Tests
Update Storage Unit Tests

Made some changes in how the unit tests were structured so
that it will be easier to identify problems with changes to
storage.

Issue #1248

Change-Id: I8331f18e9c9e360cf8057737ddfd71c7152a744b

shaka-project/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,tvoli/shaka-player,TheModMaker/shaka-player,tvoli/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,TheModMaker/shaka-player