Fixes Hyper-V dynamic memory issue with vNUMA

vNUMA and dynamic memory are mutually exclusive, so the former
needs to be disabled for instances where dynamic memory is enabled.

Change-Id: Ic730c294ffc89925076688a44adf2594c7f6712b
Closes-Bug: #1305897

Conflicts:
	nova/tests/virt/hyperv/test_vmutils.py
	nova/tests/virt/hyperv/test_vmutilsv2.py
	nova/virt/hyperv/vmutils.py