[libvirt] [PATCH 0/3 v2] Add lsi and virtio-scsi qemu caps

[Guannan Ren]

Add two capabilities flags for the model of scsi controller LSI and
virtio-scsi.
Use the lsilogic model by default, if current QEMU supports doesn't it,
raise an error.
When scsi model is given in XML explicitly, we try to check if
the underlying QEMU supports it or not, raise an error on checking
failure.

Guannan Ren(3)
  qemu: add capabilities flags related to scsi controller
  qemu: add two qemu caps for lsi and virtio-scsi SCSI
  add lsi and virtio-scsi qemu caps in testcases.

 src/qemu/qemu_capabilities.c |    7 +++
 src/qemu/qemu_capabilities.h |    2 +
 src/qemu/qemu_command.c      |  106 +++++++++++++++++++++++++++++++----------
 src/qemu/qemu_command.h      |    3 +-
 src/qemu/qemu_process.c      |    9 ++-
 tests/qemuhelptest.c         |   10 +++-
 tests/qemuxml2argvtest.c     |   16 ++++--
 7 files changed, 114 insertions(+), 39 deletions(-)