suites/hadoop: use xfs

This avoids working aroudn ext4 limits.  Whatev.

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/suites/hadoop/basic/xfs.yaml b/suites/hadoop/basic/xfs.yaml
new file mode 120000 (symlink)
index 0000000..0350079
--- /dev/null
+++ b/suites/hadoop/basic/xfs.yaml
@@ -0,0 +1 @@
+../../../fs/xfs.yaml
\ No newline at end of file