Test: Update tests for no partial asset rw

- Change tests to use full rws if partial rws aren't part of the
test
- Change partial read test to check for failure if partial
rws are disabled
- Disable other tests that need a partial rw when partial rw is
disabled

Change-Id: I55c96e49a1c250a6a3ba59cf49cda46eab97d483
Signed-off-by: Ben Davis <ben.davis@arm.com>
9 files changed