look up by username instead of subject

openid-connect-common/src/main/java/org/mitre/openid/connect/web/UserInfoInterceptor.java

@@ -88,7 +88,7 @@ public class UserInfoInterceptor extends HandlerInterceptorAdapter {
 					if (p != null && p.getName() != null) { // don't bother checking if we don't have a principal
 	
 						// try to look up a user based on the principal's name
-						UserInfo user = userInfoService.getBySubject(p.getName());
+						UserInfo user = userInfoService.getByUsername(p.getName());
 	
 						// if we have one, inject it so views can use it
 						if (user != null) {

openid-connect-server/src/main/java/org/mitre/openid/connect/web/UserInfoEndpoint.java

@@ -61,11 +61,11 @@ public class UserInfoEndpoint {
 			return "httpCodeView";
 		}
 
-		String userId = p.getName();
-		UserInfo userInfo = userInfoService.getBySubject(userId);
+		String username = p.getName();
+		UserInfo userInfo = userInfoService.getByUsername(username);
 
 		if (userInfo == null) {
-			logger.error("getInfo failed; user not found: " + userId);
+			logger.error("getInfo failed; user not found: " + username);
 			model.addAttribute("code", HttpStatus.NOT_FOUND);
 			return "httpCodeView";
 		}