Add volume retype support for Huawei driver

Add volume retype support for Huawei driver

Add retype volume function for Huawei driver, including
SmartQos, SmartTier, SmartPartition and SmartCache,
SmartThin/Thick.

This commit adds the following qualified extra-specs:
  * capabilities:smarttier='<is> True'
    smarttier:policy='X'(X:0,1,2,3)"(default value is 1)
  * capabilities:smartpartition='<is> True'
    smartpartition:partitionname=test_partition_name
  * capabilities:smartcache='<is> True'
    smartcache:cachename=test_cache_name
  * capabilities:thin_provisioning='<is> True'
  * capabilities:thick_provisioning='<is> True'

Implements: blueprint huawei-driver-support-retype
Change-Id: I6bd1d39aca5a368594ca39c75c86eaf6ab20b00c