Adding lost quotes in json format (RC). Fixes issue 7018

Author: barancev

Diff for: java/server/src/org/openqa/selenium/server/commands/CaptureNetworkTrafficCommand.java

@@ -207,24 +207,18 @@ private String jsonKey(final String key) {
   }
 
   private Object json(String s) {
-    return escape(s);
-  }
-
-  // -------------- Copied from JSONValue -------------------
-  /**
-   * Escape quotes, \, /, \r, \n, \b, \f, \t and other control characters (U+0000 through U+001F).
-   * @param s
-   * @return
-   */
-  private static String escape(String s){
     if(s==null)
       return null;
     StringBuffer sb = new StringBuffer();
+    sb.append("\"");
     escape(s, sb);
+    sb.append("\"");
     return sb.toString();
   }
 
+  // -------------- Copied from JSONValue -------------------
   /**
+   * Escape quotes, \, /, \r, \n, \b, \f, \t and other control characters (U+0000 through U+001F).
    * @param s - Must not be null.
    * @param sb
    */