Fix another Jenkins build failure.
diff --git a/juneau-server/src/main/java/org/apache/juneau/server/RestServlet.java b/juneau-server/src/main/java/org/apache/juneau/server/RestServlet.java
index c0b5662..476964b 100755
--- a/juneau-server/src/main/java/org/apache/juneau/server/RestServlet.java
+++ b/juneau-server/src/main/java/org/apache/juneau/server/RestServlet.java
@@ -119,7 +119,7 @@
private String[] staticFilesPrefixes;
private ResponseHandler[] responseHandlers;
private String clientVersionHeader = "";
- private Map<Locale,Swagger> swaggers = new ConcurrentHashMap<Locale,Swagger>();
+ private ConcurrentHashMap<Locale,Swagger> swaggers = new ConcurrentHashMap<Locale,Swagger>();
RestServletContext context;