qa: enable debug mds/client for fs/nfs suite

Fixes: http://tracker.ceph.com/issues/63482
Signed-off-by: Venky Shankar <vshankar@redhat.com>
(cherry picked from commit d5834c9af6013a23324a808570b22c819988ce03)

diff --git a/qa/suites/fs/nfs/conf b/qa/suites/fs/nfs/conf
new file mode 120000 (symlink)
index 0000000..9de8742
--- /dev/null
+++ b/qa/suites/fs/nfs/conf
@@ -0,0 +1 @@
+./.qa/cephfs/conf
\ No newline at end of file