test: return the iteration number to the end of the test path

When we generate a path to the previous images, we take a directory name
and the previous iteration number.

Reported-by: Mr Jenkins
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.sh

@@ -650,11 +650,12 @@ EOF
 		gen_args="$gen_args --force-irmap"
 	fi
 
+	ddump=`readlink -fm dump/$test_name/$PID/$i`
 	for i in `seq $ITERATIONS`; do
 		local cpt_args=
 		local dump_only=
 		local dump_cmd="dump"
-		ddump=`readlink -fm dump/$test_name/$i/$PID`
+		ddump=`dirname $ddump`/$i
 		DUMP_PATH=$ddump
 		echo Dump $PID
 		mkdir -p $ddump