handle creation time stamp in clients, closes mitreid-connect#1210

Author: jricher

openid-connect-server/src/main/java/org/mitre/openid/connect/service/impl/MITREidDataService_1_3.java

@@ -529,6 +529,7 @@ private void writeClients(JsonWriter writer) {
 writer.name(SOFTWARE_ID).value(client.getSoftwareId());
 writer.name(SOFTWARE_VERSION).value(client.getSoftwareVersion());
 writer.name(SOFTWARE_STATEMENT).value(client.getSoftwareStatement() != null ? client.getSoftwareStatement().serialize() : null);
+writer.name(CREATION_DATE).value(toUTCString(client.getCreatedAt()));
 writer.endObject();
 logger.debug("Wrote client {}", client.getId());
 } catch (IOException ex) {
@@ -1169,6 +1170,9 @@ private void readClients(JsonReader reader) throws IOException {
 } catch (ParseException e) {
 logger.error("Couldn't parse software statement", e);
 }
+} else if (name.equals(CREATION_DATE)) {
+Date date = utcToDate(reader.nextString());
+client.setCreatedAt(date);
 } else {
 logger.debug("Found unexpected entry");
 reader.skipValue();