Allow to log rendered Soy templates

This is useful for debugging where which escaping takes place.

Change-Id: I2e795bc4188a8e04aacd4e39ddc13915c454befa
diff --git a/src/main/java/com/googlesource/gerrit/plugins/its/base/workflow/AddSoyComment.java b/src/main/java/com/googlesource/gerrit/plugins/its/base/workflow/AddSoyComment.java
index 3ee4ca8..bc8b9dc 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/its/base/workflow/AddSoyComment.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/its/base/workflow/AddSoyComment.java
@@ -76,7 +76,9 @@
             .newRenderer("etc.its.templates." + template)
             .setContentKind(kind)
             .setData(properties);
-    return renderer.render();
+    String rendered = renderer.render();
+    logger.atFinest().log("Rendered template %s to:\n%s", templatePath, rendered);
+    return rendered;
   }
 
   private String soyTextTemplate(Builder builder, String template, Map<String, String> properties) {