Fix shebangs on import tests

Incorrect shebangs were used when porting.

Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Signed-off-by: bunder2015 <omfgbunder@gmail.com>
Closes #7523  
Closes #7524

tests/zfs-tests/tests/functional/cli_root/zpool_import/import_cache_device_added.ksh

@@ -1,4 +1,4 @@
-#!/usr/bin/ksh -p
+#!/bin/ksh -p
 
 #
 # This file and its contents are supplied under the terms of the

tests/zfs-tests/tests/functional/cli_root/zpool_import/import_cache_device_removed.ksh

@@ -1,4 +1,4 @@
-#!/usr/bin/ksh -p
+#!/bin/ksh -p
 
 #
 # This file and its contents are supplied under the terms of the

tests/zfs-tests/tests/functional/cli_root/zpool_import/import_cache_device_replaced.ksh

@@ -1,4 +1,4 @@
-#!/usr/bin/ksh -p
+#!/bin/ksh -p
 
 #
 # This file and its contents are supplied under the terms of the

tests/zfs-tests/tests/functional/cli_root/zpool_import/import_cache_mirror_attached.ksh

@@ -1,4 +1,4 @@
-#!/usr/bin/ksh -p
+#!/bin/ksh -p
 
 #
 # This file and its contents are supplied under the terms of the

tests/zfs-tests/tests/functional/cli_root/zpool_import/import_cache_mirror_detached.ksh

@@ -1,4 +1,4 @@
-#!/usr/bin/ksh -p
+#!/bin/ksh -p
 
 #
 # This file and its contents are supplied under the terms of the

tests/zfs-tests/tests/functional/cli_root/zpool_import/import_cache_shared_device.ksh

@@ -1,4 +1,4 @@
-#!/usr/bin/ksh -p
+#!/bin/ksh -p
 
 #
 # This file and its contents are supplied under the terms of the

tests/zfs-tests/tests/functional/cli_root/zpool_import/import_devices_missing.ksh

@@ -1,4 +1,4 @@
-#!/usr/bin/ksh -p
+#!/bin/ksh -p
 
 #
 # This file and its contents are supplied under the terms of the

tests/zfs-tests/tests/functional/cli_root/zpool_import/import_paths_changed.ksh

@@ -1,4 +1,4 @@
-#!/usr/bin/ksh -p
+#!/bin/ksh -p
 
 #
 # This file and its contents are supplied under the terms of the

tests/zfs-tests/tests/functional/cli_root/zpool_import/import_rewind_config_changed.ksh

@@ -1,4 +1,4 @@
-#!/usr/bin/ksh -p
+#!/bin/ksh -p
 
 #
 # This file and its contents are supplied under the terms of the

tests/zfs-tests/tests/functional/cli_root/zpool_import/import_rewind_device_replaced.ksh

@@ -1,4 +1,4 @@
-#!/usr/bin/ksh -p
+#!/bin/ksh -p
 
 #
 # This file and its contents are supplied under the terms of the

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

@@ -1,4 +1,4 @@
-#!/usr/bin/ksh
+#!/bin/ksh
 
 #
 # This file and its contents are supplied under the terms of the