qemu: Handle SecurityManagerVerify in post parse

Rather than open coding calls. I can't see any reason not to

src/qemu/qemu_domain.c

@@ -1255,6 +1255,9 @@ qemuDomainDefPostParse(virDomainDefPtr def,
     if (qemuCanonicalizeMachine(def, qemuCaps) < 0)
         goto cleanup;
 
+    if (virSecurityManagerVerify(driver->securityManager, def) < 0)
+        goto cleanup;
+
     ret = 0;
  cleanup:
     virObjectUnref(qemuCaps);

src/qemu/qemu_driver.c

@@ -1723,9 +1723,6 @@ static virDomainPtr qemuDomainCreateXML(virConnectPtr conn,
     if (virDomainCreateXMLEnsureACL(conn, def) < 0)
         goto cleanup;
 
-    if (virSecurityManagerVerify(driver->securityManager, def) < 0)
-        goto cleanup;
-
     if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache, def->emulator)))
         goto cleanup;
 
@@ -7502,9 +7499,6 @@ static virDomainPtr qemuDomainDefineXMLFlags(virConnectPtr conn, const char *xml
     if (virDomainDefineXMLFlagsEnsureACL(conn, def) < 0)
         goto cleanup;
 
-    if (virSecurityManagerVerify(driver->securityManager, def) < 0)
-        goto cleanup;
-
     if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache, def->emulator)))
         goto cleanup;