Added three new mmap(2) test scenarios.

Sponsored by:	EMC / Isilon storage division
Added one more "umount -f" test scenario.

Sponsored by:	EMC / Isilon storage division
Added sendfile(2) for the posix shared memory segment file descriptor
test scenario.

Sponsored by:	EMC / Isilon storage division
Fix compiler warning.

Sponsored by:	EMC / Isilon storage division
Added more SU+J test scenarios.

Sponsored by:	EMC / Isilon storage division
Fixed typo.

Submitted by:	yaneurabeya
Sponsored by:	EMC / Isilon storage division