Rename test_kill_ipfs_mount into test_kill_ipfs_daemon

License: MIT
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Rename test_launch_ipfs_mount into test_launch_ipfs_daemon_and_mount

License: MIT
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Add an EXPENSIVE prereq and use it in t0040

We add this prereq to tests with a 100MB file
as they are slow on Travis CI.

License: MIT
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Add sharness mount tests with a 5 MB file

These new tests are not marked EXPENSIVE as they
should be fast enough even on Travis CI.

License: MIT
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Merge pull request #371 from chriscool/test_add_expensive_prereq

Add EXPENSIVE prereq to sharness tests