conf: Automatically use NUMA memory size in case NUMA is enabled

Use the NUMA total instead of the configured size both in XML and for
uses in the code once NUMA is enabled for a domain.

One test case change is necessary as the rounding of the individual cell
sizes was not matching the rounding of the total size.

src/conf/domain_conf.c

@@ -6985,6 +6985,12 @@ virDomainParseMemoryLimit(const char *xpath,
 unsigned long long
 virDomainDefGetMemoryInitial(virDomainDefPtr def)
 {
+    unsigned long long ret;
+
+    /* return NUMA memory size total in case numa is enabled */
+    if ((ret = virDomainNumaGetMemorySize(def->numa)) > 0)
+        return ret;
+
     return def->mem.max_balloon;
 }
 

tests/qemuxml2argvdata/qemuxml2argv-numatune-memnode.args

 LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
-/usr/bin/kvm -S -M pc -m 24104 -smp 32 \
+/usr/bin/kvm -S -M pc -m 24105 -smp 32 \
 -object memory-backend-ram,id=ram-node0,size=20971520,host-nodes=3,\
 policy=preferred \
 -numa node,nodeid=0,cpus=0,memdev=ram-node0 \