Add dirty bitmap information to QCOW2 metadata dump in the qcow2_format.py.

v8:
  01: Hard refactoring of the v7 code in qcow2_format.py based on Vladimir's
      review. See the thread with the message ID:
      <1591920302-1002219-1-git-send-email-andrey.shinkevich@virtuozzo.com>

Andrey Shinkevich (10):
  qcow2: Fix capitalization of header extension constant.
  qcow2_format.py: make printable data an extension class member
  qcow2_format.py: change Qcow2BitmapExt initialization method
  qcow2_format.py: dump bitmap flags in human readable way.
  qcow2_format.py: Dump bitmap directory information
  qcow2_format.py: pass cluster size to substructures
  qcow2_format.py: Dump bitmap table serialized entries
  qcow2.py: Introduce '-j' key to dump in JSON format
  qcow2_format.py: collect fields to dump in JSON format
  qcow2_format.py: support dumping metadata in JSON format

 block/qcow2.c                      |   2 +-
 docs/interop/qcow2.txt             |   2 +-
 tests/qemu-iotests/291.out         |  90 ++++++++++++++++
 tests/qemu-iotests/qcow2.py        |  19 +++-
 tests/qemu-iotests/qcow2_format.py | 212 ++++++++++++++++++++++++++++++++++---
 5 files changed, 304 insertions(+), 21 deletions(-)

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1.8.3.1