VMwareVCDriver Fix sparse disk copy error on spawn

The same approach of calling VirtualDiskManager.CopyVirtualDisk
without destination disk spec in the cluster driver for fixing 1184807
turns out to work for copying a sparse disk as well because vCenter's behavior
for specless copy is to do the reasonable thing of converting a sparse disk to
thin-provisioned, and a flat disk to preallocated.

Tests done:

Verified using tempest that sparse/thin/preallocated image types deploys
properly through the cluster driver. Tempest output to be included in
the review comments.

Fixes bug 1171226

(cherry picked from commit 42e929e990c7d5c4484c05bc92e57f64ca85629e)

Conflicts:

	nova/tests/virt/vmwareapi/test_vmwareapi.py
	nova/virt/vmwareapi/vmops.py

Change-Id: I51627ddb4b9df8cf80f0b9c6efe68ec9eb68cd99
VMware: Fix bug for root disk size

The code would not configure the root disk size to that specified
in the flavor. This was always the size of the glance image.

Fixes bug: 1226052

(cherry picked from commit f0a9b31d90532dd278c12572767c3874648dcaec)

Conflicts:

	nova/tests/virt/vmwareapi/test_vmwareapi.py
	nova/virt/vmwareapi/vmops.py

Change-Id: Ifc41e6f5bf95c17bac6ab26e9c08aa28d0325bcd
VMWare: Disabling linked clone doesn't cache images

This fixes an issue when use_linked_clone is false and the image is
already in the cache.  The problem was that the image would be
copied from glance into the instance directory even if it was already
in the cache.  This change checks if the file is in the cache, only
copies from glance if it is not, and copies the image from the cache
into the instance directory if use_linked_clone is false.

Fixes: bug #1207064
(cherry picked from commit c53b0f66802ed82fea8c637f0138c0a01e159efa)

Conflicts:

	nova/tests/virt/vmwareapi/test_vmwareapi.py
	nova/virt/vmwareapi/vmops.py

Change-Id: I635e00448fc014b3841ed43b590d451305e8ff2f
Merge "VMwareVCDriver Fix sparse disk copy error on spawn" into stable/grizzly
Merge "VMware: Fix bug for root disk size" into stable/grizzly
Merge "VMWare: Disabling linked clone doesn't cache images" into stable/grizzly
Merge branch 'stable/grizzly' of https://github.com/openstack/nova into grizzly/stable