Using a string search for Fail is not going to work always e.g.
when all tests are passing it still prints a summary string with string
"Fail" in it which points to 0, however the logic here catches that and
counts it as 1 failure and marks the return value as 1 and ptest runner
interprets that as failure
Pass the return value from unit.test which should be 0 on all passes
or non zero otherwise.
Signed-off-by: Khem Raj <raj.khem@gmail.com>
af1612a85b