Add new test files from old official documentation

https://archive.kernel.org/oldwiki/raid.wiki.kernel.org/index.php/Mdstat.html

test/test1

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+Personalities : [raid1] [raid6] [raid5] [raid4]
+md_d0 : active raid5 sde1[0] sdf1[4] sdb1[5] sdd1[2] sdc1[1]
+      1250241792 blocks super 1.2 level 5, 64k chunk, algorithm 2 [5/5] [UUUUU]
+      bitmap: 0/10 pages [0KB], 16384KB chunk
+
+unused devices: <none>

test/test2

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+Personalities : [raid6] [raid5] [raid4]
+md0 : active raid5 sda1[0] sdd1[2] sdb1[1]
+     1465151808 blocks level 5, 64k chunk, algorithm 2 [3/2] [UU_]
+    unused devices: <none>

test/test3

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+Personalities : [raid1] [raid6] [raid5] [raid4]
+md1 : active raid1 sdb2[1] sda2[0]
+      136448 blocks [2/2] [UU]
+
+md2 : active raid1 sdb3[1] sda3[0]
+      129596288 blocks [2/2] [UU]
+
+md3 : active raid5 sdl1[9] sdk1[8] sdj1[7] sdi1[6] sdh1[5] sdg1[4] sdf1[3] sde1[2] sdd1[1] sdc1[0]
+      1318680576 blocks level 5, 1024k chunk, algorithm 2 [10/10] [UUUUUUUUUU]
+
+md0 : active raid1 sdb1[1] sda1[0]
+      16787776 blocks [2/1] [U_]
+
+unused devices: <none>

test/test4

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+Personalities : [raid1] [raid6] [raid5] [raid4]
+md127 : active raid5 sdh1[6] sdg1[4] sdf1[3] sde1[2] sdd1[1] sdc1[0]
+      1464725760 blocks level 5, 64k chunk, algorithm 2 [6/5] [UUUUU_]
+      [==>..................]  recovery = 12.6% (37043392/292945152) finish=127.5min speed=33440K/sec
+
+unused devices: <none>

test/test5

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+Personalities : [linear] [raid0] [raid1] [raid5] [raid4] [raid6]
+md0 : active raid6 sdf1[0] sde1[1] sdd1[2] sdc1[3] sdb1[4] sda1[5] hdb1[6]
+      1225557760 blocks level 6, 256k chunk, algorithm 2 [7/7] [UUUUUUU]
+      bitmap: 0/234 pages [0KB], 512KB chunk
+
+unused devices: <none>

test/test6

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+Personalities : [raid1]
+md1 : active raid1 sde1[6](F) sdg1[1] sdb1[4] sdd1[3] sdc1[2]
+      488383936 blocks [5/3] [_UUU_]
+
+unused devices: <none>