[GFS2] Set drop_count to 0 (off) by default

This sets the drop_count to 0 by default which is a better default
for most people.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/locking/dlm/lock_dlm.h

@@ -36,7 +36,7 @@
 
 #define GDLM_STRNAME_BYTES	24
 #define GDLM_LVB_SIZE		32
-#define GDLM_DROP_COUNT		200000
+#define GDLM_DROP_COUNT		0
 #define GDLM_DROP_PERIOD	60
 #define GDLM_NAME_LEN		128