mdadm/clustermd_tests: add test case to test creating cluster-raid10

00r10_Create: It contains 4 scenarios of creating clustered raid10.
1. General creating, master node does resync and slave node does
   Pending.
2. Creating clustered raid10 with --assume-clean.
3. Creating clustered raid10 with spare disk.
4. Creating clustered raid10 with --name.

Signed-off-by: Zhilong Liu <zlliu@suse.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>

clustermd_tests/00r10_Create

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+mdadm -CR $md0 -l10 -b clustered --layout n2 -n2 $dev0 $dev1
+ssh $NODE2 mdadm -A $md0 $dev0 $dev1
+check $NODE1 resync
+check $NODE2 PENDING
+check all wait
+check all raid10
+check all bitmap
+check all nosync
+check all state UU
+check all dmesg
+stop_md all $md0
+
+mdadm -CR $md0 -l10 -b clustered -n3 --layout n3 $dev0 $dev1 $dev2 --assume-clean
+ssh $NODE2 mdadm -A $md0 $dev0 $dev1 $dev2
+check all nosync
+check all raid10
+check all bitmap
+check all state UUU
+check all dmesg
+stop_md all $md0
+
+mdadm -CR $md0 -l10 -b clustered -n2 -x1 --layout n2 $dev0 $dev1 $dev2 --assume-clean
+ssh $NODE2 mdadm -A $md0 $dev0 $dev1 $dev2
+check all nosync
+check all raid10
+check all bitmap
+check all spares 1
+check all state UU
+check all dmesg
+stop_md all $md0
+
+name=tstmd
+mdadm -CR $md0 -l10 -b clustered -n2 $dev0 $dev1 --layout n2 --name=$name --assume-clean
+ssh $NODE2 mdadm -A $md0 $dev0 $dev1
+check all nosync
+check all raid10
+check all bitmap
+check all state UU
+for ip in $NODE1 $NODE2
+do
+	ssh $ip "mdadm -D $md0 | grep 'Name' | grep -q $name"
+	[ $? -ne '0' ] &&
+		die "$ip: check --name=$name failed."
+done
+check all dmesg
+stop_md all $md0
+
+exit 0