testutilsqemuschema: Add template checker for schema entries

We'll need to match that a certain part of the qemu schema hasn't grown
new properties unexpectedly. Add a helper which matches an 'object' QMP
schema entry against a template and reports errors if expected types
don't match or new entries are added.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>

tests/testutilsqemuschema.h

@@ -37,6 +37,11 @@ testQEMUSchemaValidateCommand(const char *command,
                               bool allowRemoved,
                               virBufferPtr debug);
 
+int
+testQEMUSchemaEntryMatchTemplate(virJSONValuePtr schemaentry,
+                                 ...);
+
+
 virJSONValuePtr
 testQEMUSchemaGetLatest(const char* arch);