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

v10:
  01: The modification of the 291.out was removed.
  02: Qcow2BitmapExt modified to take control over file cursor position while
      reading the bitmap extension data from the file (suggested by Vladimir).
  03: The format string for bitmap flags output modified
      (suggested by Vladimir).

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/qcow2.py        |  19 +++-
 tests/qemu-iotests/qcow2_format.py | 223 +++++++++++++++++++++++++++++++++----
 5 files changed, 218 insertions(+), 28 deletions(-)

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1.8.3.1