Use UTF-8 for HTTP Response on Velocity views

We need to define UTF-8 encoding on the Velocity
views response body. Without this setting the default
ISO-8859-1 was used with the inability to encode
latin accents or other encoded characters in
GitHub full name.

Change-Id: I9d33525b035a0675c69581fc39804138ffae763b

github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/velocity/VelocityViewServlet.java

diff --git a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/velocity/VelocityViewServlet.java b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/velocity/VelocityViewServlet.java
index de76a7a..2035f9a 100644
--- a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/velocity/VelocityViewServlet.java
+++ b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/velocity/VelocityViewServlet.java
@@ -14,6 +14,7 @@
 package com.googlesource.gerrit.plugins.github.velocity;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.Map.Entry;
 
 import javax.servlet.ServletException;
@@ -90,6 +91,7 @@
       VelocityContext context = initVelocityModel(req).getContext();
       context.put("request", req);
       resp.setHeader("content-type", "text/html");
+      resp.setCharacterEncoding(StandardCharsets.UTF_8.name());
       template.merge(context, resp.getWriter());
     } catch (ResourceNotFoundException e) {
       log.error("Cannot load velocity template " + pathInfo, e);