tst_qdbusmarshall depends on a specific QHash ordering

FAIL!  : tst_QDBusMarshall::sendMaps(gs-map) Compared values are not the same
   Actual   (QDBusUtil::argumentToString(reply.arguments().at(i))): [Argument: a{gs} {[Signature: i] = "int32", [Signature: a{gs}] = "array of dict_entry of (signature, string)", [Signature: s] = "string"}]
   Expected (stringResult): [Argument: a{gs} {[Signature: a{gs}] = "array of dict_entry of (signature, string)", [Signature: i] = "int32", [Signature: s] = "string"}]
   Loc: [../tst_qdbusmarshall.cpp(779)]
FAIL!  : tst_QDBusMarshall::sendMaps(sv-map2) Compared values are not the same
   Actual   (QDBusUtil::argumentToString(reply.arguments().at(i))): [Argument: a{sv} {"gsmap" = [Variant: [Argument: a{gs} {[Signature: i] = "int32", [Signature: a{gs}] = "array of dict_entry of (signature, string)", [Signature: s] = "string"}]], "ismap" = [Variant: [Argument: a{is} {-47 = "c", 1 = "a", 2000 = "b"}]], "osmap" = [Variant: [Argument: a{os} {[ObjectPath: /] = "root", [ObjectPath: /bar/baz] = "bar and baz", [ObjectPath: /foo] = "foo"}]], "ssmap" = [Variant: [Argument: a{ss} {"a" = "a", "b" = "c", "c" = "b"}]]}]
   Expected (stringResult): [Argument: a{sv} {"gsmap" = [Variant: [Argument: a{gs} {[Signature: a{gs}] = "array of dict_entry of (signature, string)", [Signature: i] = "int32", [Signature: s] = "string"}]], "ismap" = [Variant: [Argument: a{is} {-47 = "c", 1 = "a", 2000 = "b"}]], "osmap" = [Variant: [Argument: a{os} {[ObjectPath: /] = "root", [ObjectPath: /bar/baz] = "bar and baz", [ObjectPath: /foo] = "foo"}]], "ssmap" = [Variant: [Argument: a{ss} {"a" = "
   Loc: [../tst_qdbusmarshall.cpp(779)]
FAIL!  : tst_QDBusMarshall::sendComplex(sv-map) Compared values are not the same
   Actual   (QDBusUtil::argumentToString(reply.arguments().at(i))): [Argument: a{sv} {"a" = [Variant(int): 1], "b" = [Variant(QByteArray): {99}], "c" = [Variant(QString): "b"], "d" = [Variant(uint): 42], "date" = [Variant: [Argument: (iii) 1977, 1, 1]], "datetime" = [Variant: [Argument: ((iii)(iiii)i) [Argument: (iii) 0, 0, 0], [Argument: (iiii) 8, 59, 31, 0], 0]], "dtlist" = [Variant: [Argument: a((iii)(iiii)i) {[Argument: ((iii)(iiii)i) [Argument: (iii) 0, 0, 0], [Argument: (iiii) -1, -1, -1, -1], 0], [Argument: ((iii)(iiii)i) [Argument: (iii) 1977, 9, 13], [Argument: (iiii) 0, 0, 0, 0], 0], [Argument: ((iii)(iiii)i) [Argument: (iii) 2006, 6, 18], [Argument: (iiii) 13, 14, 0, 0], 0]}]], "e" = [Variant(short): -47], "f" = [Variant: [Variant(int): 0]], "gsmap" = [Variant: [Argument: a{gs} {[Signature: i] = "int32", [Signature: a{gs}] = "array of dict_entry of (signature, string)", [Signature: s] = "string"}]], "ismap" = [Variant: [Argument: a{is} {-47 = "c", 1 = "a", 2000 = "
   Loc: [../tst_qdbusmarshall.cpp(779)]