tests: zero devices before --adding them.

Linux 3.10 will allow more "--add" to be handled as "--re-add".
To be sure the tests work correctly we sometimes need to zero
the device to ensure it really is an --add that happens.

Signed-off-by: NeilBrown <neilb@suse.de>

tests/05r1-bitmapfile

@@ -33,6 +33,7 @@ mdadm -S $md0
 
 mdadm --assemble -R $md0 --bitmap=$bmf $dev2
 dirty4=`mdadm -X $bmf | sed -n -e 's/.*Bitmap.* \([0-9]*\) dirty.*/\1/p'`
+mdadm --zero $dev1 # force --add, not --re-add
 mdadm $md0 --add $dev1
 #it is too fast# check recovery
 

tests/05r5-bitmapfile

@@ -32,6 +32,7 @@ fi
 mdadm -S $md0
 
 mdadm --assemble -R $md0 --bitmap=$bmf $dev2 $dev3
+mdadm --zero $dev1 # force add, not re-add
 mdadm $md0 --add $dev1
 check recovery
 

tests/05r5-internalbitmap

@@ -30,6 +30,7 @@ fi
 mdadm -S $md0
 
 mdadm --assemble -R $md0  $dev2 $dev3
+mdadm --zero $dev1 # force --add, not --re-add
 mdadm $md0 --add $dev1
 check recovery
 

tests/05r6-bitmapfile

@@ -32,6 +32,7 @@ fi
 mdadm -S $md0
 
 mdadm --assemble -R $md0 --bitmap=$bmf $dev1 $dev2 $dev4
+mdadm --zero $dev3 # force --add, not --re-add
 mdadm $md0 --add $dev3
 check recovery