Refine TestJsonReadNotecard() and use / instead of . to separate paths.

An attack of the stupid meant that I was using / as a path separator.
Fixing this makes the tests behave better, though still with some questions.
Also, I imagine / shouldn't really put data in the root as that's not a valid identifier.
This commit also fix the / mistake in other tests those this does not affect their outcomes.
Merge branch 'master' of ssh://opensimulator.org/var/git/opensim