Enable zfs_rename_002_pos, zfs_rename_005_neg, zfs_rename_007_pos

These tests all pass once updated to wait for udev to create the
expected linked under /dev/zvol/.

Reviewed-by: luozhengzheng <luo.zhengzheng@zte.com.cn>
Reviewed-by: yuxiang <guo.yong33@zte.com.cn>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #5275

tests/zfs-tests/tests/functional/cli_root/zfs_rename/zfs_rename.kshlib

@@ -71,6 +71,7 @@ function rename_dataset # src dest
 	typeset dest=$2
 
 	log_must $ZFS rename $src $dest
+	block_device_wait
 
 	#
 	# Verify src name no longer in use

tests/zfs-tests/tests/functional/cli_root/zfs_rename/zfs_rename_007_pos.ksh

@@ -117,6 +117,7 @@ log_must $DIFF $SRC_FILE $obj
 if is_global_zone; then
 	vol=$TESTPOOL/$TESTFS/vol.$$ ;	volclone=$TESTPOOL/$TESTFS/volclone.$$
 	log_must $ZFS create -V 100M $vol
+	block_device_wait
 
 	obj=$(target_obj $vol)
 	log_must $DD if=$SRC_FILE of=$obj bs=$BS count=$CNT
@@ -124,10 +125,12 @@ if is_global_zone; then
 	snap=${vol}@snap.$$
 	log_must $ZFS snapshot $snap
 	log_must $ZFS clone $snap $volclone
+	block_device_wait
 
 	# Rename dataset & clone
 	log_must $ZFS rename $vol ${vol}-new
 	log_must $ZFS rename $volclone ${volclone}-new
+	block_device_wait
 
 	# Compare source file and target file
 	obj=$(target_obj ${vol}-new)
@@ -141,6 +144,7 @@ if is_global_zone; then
 	log_must $ZFS rename ${vol}-new $vol
 	log_must $ZFS rename $snap ${snap}-new
 	log_must $ZFS clone ${snap}-new $volclone
+	block_device_wait
 
 	# Compare source file and target file
 	obj=$(target_obj $volclone)