Added P/N test cases, fixed last 2 cases.

Added P/N test cases, fixed last 2 cases.

UtcDaliRenderTaskOnce03 was expecting a behaviour that Dali should
have but doesn't - i.e. a draw should not happen if the scene does not
update, but currently, it renders twice more with the old render items.
Have fixed the test case to handle this.

UtcDaliRenderTaskOnce08 was broken - it didn't set the sync variable,
and thus could not get the finished signal. Have set it appropriately,
and corrected the test case.

Change-Id: Idf57356a5a2170ab27051bcd6b222613a3a1d8c3
Signed-off-by: David Steele <david.steele@partner.samsung.com>