test_hardware: code formating for multiline construct

The coding style, in test cases of VCPUTopologyTest and
 NUMATopologyTest test classes from file test_hardware.py,
is inconsistent. This patch is to reformat these part of
code according to following rules:

- Arrange the `extra_specs` property in a seperate line to allow the
  extra_spec with a long name or value.

    An example:
    some code before reformating:

    "flavor": objects.Flavor(vcpus=4, memory_mb=2048,
                             extra_specs={
        "hw:cpu_max_sockets": "5",
        "hw:cpu_max_cores": "2",
        "hw:cpu_max_threads": "3",
    }),

    It will be formated as:

	"flavor": objects.Flavor(
            vcpus=4, memory_mb=2048,
            extra_specs={
                "hw:cpu_max_sockets": "5",
                "hw:cpu_max_cores": "2",
                "hw:cpu_max_threads": "3",
	    }
	)

- *Try* to put the closing brace/bracket/parenthesis on multiline
  constructs line up under the first character of the line that
  starts the multiline construct.

  example:
  a piece of code in original code
    {
        "numa_topology": objects.InstanceNUMATopology(
            cells=[
                objects.InstanceNUMACell(
                id=0, cpuset=set([0, 1, 2, 3]), memory=2048,
                cpu_topology=objects.VirtCPUTopology(
                sockets=1, cores=1, threads=4))]),
        "expect": [2, 1, 2]
    },

  after the reformating, it would be

    {
        "numa_topology": objects.InstanceNUMATopology(cells=[
            objects.InstanceNUMACell(
                id=0, cpuset=set([0, 1, 2, 3]), memory=2048,
                cpu_topology=objects.VirtCPUTopology(
                sockets=1, cores=1, threads=4)),
        ]),
        "expect": [2, 1, 2]
    },

- No space or new-line between an empty brace:

  change following code

  "image": {
  }

  to

  "image": {}

Change-Id: I81f1af98861a7f26d34348473ec245598ff856a8
Signed-off-by: Wang Huaqiang <huaqiang.wang@intel.com>