Adding structure and defines for virDomainSet/GetMemoryParameters

This patch adds a structure virMemoryParameter, it contains the name of
the
parameter and the type of the parameter along with a union.

dv:
+ rename enums to VIR_DOMAIN_MEMORY_PARAM_*
+ remove some extraneous tabs

v4:
+ Add unsigned int flags to the public api for future extensions

v3:
+ Protoype for virDomainGetMemoryParameters and dummy python binding.

v2:
+ Includes dummy python bindings for the library to build cleanly.
+ Define string constants like "hard_limit", etc.
+ re-order this patch.

python/libvirt-override.c

@@ -371,6 +371,20 @@ libvirt_virDomainSetSchedulerParameters(PyObject *self ATTRIBUTE_UNUSED,
     return VIR_PY_INT_SUCCESS;
 }
 
+/* FIXME: This is a place holder for the implementation. */
+static PyObject *
+libvirt_virDomainSetMemoryParameters(PyObject *self ATTRIBUTE_UNUSED,
+                                     PyObject *args) {
+    return VIR_PY_INT_FAIL;
+}
+
+/* FIXME: This is a place holder for the implementation. */
+static PyObject *
+libvirt_virDomainGetMemoryParameters(PyObject *self ATTRIBUTE_UNUSED,
+                                     PyObject *args) {
+    return VIR_PY_INT_FAIL;
+}
+
 static PyObject *
 libvirt_virDomainGetVcpus(PyObject *self ATTRIBUTE_UNUSED,
                           PyObject *args) {