Added configuration for remote image hotplug/hotunplug

  1. Added cfg/remote_block_hotplug.cfg
  2. ceph and iscsi were supported
Signed-off-by: NZhenchao Liu <zhencliu@redhat.com>

qemu/tests/cfg/remote_block_hotplug.cfg

+# Network storage backends:
+#   iscsi_direct
+#   ceph
+# The following testing scenarios are covered:
+#   hotplug/hotunplug a remote virtio-scsi image
+#   hotplug/hotunplug a remote virtio-blk image
+
+- block_hotplug_with_remote_storage: install setup image_copy unattended_install.cdrom
+    no RHEL.3.9
+    only iscsi_direct ceph
+    virt_test_type = qemu
+    type = block_hotplug
+    bootindex_image1 = 0
+    images += " stg0"
+    boot_drive_stg0 = no
+    image_name_stg0 = images/storage0
+    image_size_stg0 = 1G
+    remove_image_stg0 = yes
+    force_create_image_stg0 = yes
+    get_disk_cmd = "ls /dev/[hsv]d[a-z]* | sort"
+    disk_op_cmd = "dd if=%s of=/dev/null bs=1k count=1000 iflag=direct &&"
+    disk_op_cmd += " dd if=/dev/zero of=%s bs=1k count=1000 oflag=direct"
+    kill_vm = yes
+    repeat_times = 1
+    need_plug = yes
+    iscsi_direct:
+        check_disk_size = no
+        lun_stg0 = 1
+    variants:
+        - fmt_qcow2:
+            image_format_stg0 = qcow2
+        - fmt_raw:
+            image_format_stg0 = raw
+        - fmt_luks:
+            image_format_stg0 = luks
+            image_secret_stg0 = hotplug
+    variants:
+        - with_block:
+            drive_format_stg0 = virtio
+        - with_scsi:
+            drive_format_stg0 = scsi-hd