test: Add test to validate that memory sizes don't get updated on migration

tests/qemuxml2argvdata/qemuxml2argv-migrate-numa-unaligned.args

@@ -0,0 +1,13 @@
+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
+/usr/bin/kvm -S -M pc -m 14338 -smp 32 \
+-object memory-backend-ram,id=ram-node0,size=20482048,host-nodes=3,\
+policy=preferred \
+-numa node,nodeid=0,cpus=0,memdev=ram-node0 \
+-object memory-backend-ram,id=ram-node1,size=675907584,host-nodes=0-7,\
+policy=bind \
+-numa node,nodeid=1,cpus=1-27,cpus=29,memdev=ram-node1 \
+-object memory-backend-ram,id=ram-node2,size=24578457600,host-nodes=1-2,\
+host-nodes=5,host-nodes=7,policy=bind \
+-numa node,nodeid=2,cpus=28,cpus=30-31,memdev=ram-node2 \
+-nographic -monitor unix:/tmp/test-monitor,server,nowait \
+-no-acpi -boot c -usb -net none -serial none -parallel none -incoming stdio

tests/qemuxml2argvdata/qemuxml2argv-migrate-numa-unaligned.xml

@@ -0,0 +1,33 @@
+<domain type='qemu'>
+  <name>QEMUGuest</name>
+  <uuid>9f4b6512-e73a-4a25-93e8-5307802821ce</uuid>
+  <memory unit='KiB'>14682468</memory>
+  <currentMemory unit='KiB'>14682468</currentMemory>
+  <vcpu placement='static'>32</vcpu>
+  <numatune>
+    <memnode cellid='0' mode='preferred' nodeset='3'/>
+    <memory mode='strict' nodeset='0-7'/>
+    <memnode cellid='2' mode='strict' nodeset='1-2,5-7,^6'/>
+  </numatune>
+  <os>
+    <type arch='x86_64' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <cpu>
+    <numa>
+      <cell id='0' cpus='0' memory='20002' unit='KiB'/>
+      <cell id='1' cpus='1-27,29' memory='660066' unit='KiB'/>
+      <cell id='2' cpus='28,30-31' memory='24002400' unit='KiB'/>
+    </numa>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/kvm</emulator>
+    <controller type='usb' index='0'/>
+    <controller type='pci' index='0' model='pci-root'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>