tests/qapi-schema: Demonstrate broken discriminator errors

When the union definition's base is an object, some error messages
show it as an OrderedDict.  Oops.  Mark FIXME.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190914153506.2151-5-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

tests/qapi-schema/flat-union-invalid-discriminator.err

@@ -1 +1 @@
-tests/qapi-schema/flat-union-invalid-discriminator.json:13: Discriminator 'enum_wrong' is not a member of base struct 'TestBase'
+tests/qapi-schema/flat-union-invalid-discriminator.json:11: Discriminator 'enum_wrong' is not a member of base struct 'OrderedDict([('enum1', {'type': 'TestEnum'})])'

tests/qapi-schema/flat-union-invalid-discriminator.json

@@ -1,9 +1,7 @@
+# FIXME error message shows base as OrderedDict
 { 'enum': 'TestEnum',
   'data': [ 'value1', 'value2' ] }
 
-{ 'struct': 'TestBase',
-  'data': { 'enum1': 'TestEnum' } }
-
 { 'struct': 'TestTypeA',
   'data': { 'string': 'str' } }
 
@@ -11,7 +9,7 @@
   'data': { 'integer': 'int' } }
 
 { 'union': 'TestUnion',
-  'base': 'TestBase',
+  'base': { 'enum1': 'TestEnum' },
   'discriminator': 'enum_wrong',
   'data': { 'value1': 'TestTypeA',
             'value2': 'TestTypeB' } }

tests/qapi-schema/flat-union-invalid-if-discriminator.err

@@ -1 +1 @@
-tests/qapi-schema/flat-union-invalid-if-discriminator.json:13: The discriminator TestBase.enum1 for union TestUnion must not be conditional
+tests/qapi-schema/flat-union-invalid-if-discriminator.json:11: The discriminator OrderedDict([('enum1', OrderedDict([('type', 'TestEnum'), ('if', 'FOO')]))]).enum1 for union TestUnion must not be conditional

tests/qapi-schema/flat-union-invalid-if-discriminator.json

@@ -1,9 +1,7 @@
+# FIXME error message shows base as OrderedDict
 { 'enum': 'TestEnum',
   'data': [ 'value1', 'value2' ] }
 
-{ 'struct': 'TestBase',
-  'data': { 'enum1': { 'type': 'TestEnum', 'if': 'FOO' } } }
-
 { 'struct': 'TestTypeA',
   'data': { 'string': 'str' } }
 
@@ -11,7 +9,7 @@
   'data': { 'integer': 'int' } }
 
 { 'union': 'TestUnion',
-  'base': 'TestBase',
+  'base': { 'enum1': { 'type': 'TestEnum', 'if': 'FOO' } },
   'discriminator': 'enum1',
   'data': { 'value1': 'TestTypeA',
             'value2': 'TestTypeB' } }