SAK-25883 Get the real path to the current root.

Then walk back up the tree and into the library folder. This is because
in Tomcat 8 the getRealPath is more strict and returns null when you
attempt to access another context.

In the long run this isn’t a good solution as we should be enabling people
to run without having to unpack webapps but it gets things working.
I haven’t added a null check in here as otherwise when we start looking
at running without unpacked WARs we’ll just lose the i18n.

web/web-portlet/src/java/org/sakaiproject/portlets/PortletIFrame.java

@@ -1066,16 +1066,19 @@ private String getLocalizedURL(String property) {
 
         Locale locale = new ResourceLoader().getLocale();
 
+        // You can only access inside the current context in Tomcat 8.
+        // Tomcat 8 advises against unpacking the WARs so this isn't a good long term solution.
+        String rootPath = getPortletConfig().getPortletContext().getRealPath("/");
         if (locale != null){
             // check if localized file exists for current language/locale/variant
             String localizedFile = doc + "_" + locale.toString() + ext;
-            String filePath = getPortletConfig().getPortletContext().getRealPath(".."+localizedFile);
+            String filePath = rootPath+ ".."+localizedFile;
             if ( (new File(filePath)).exists() )
                 return localizedFile;
 
             // otherwise, check if localized file exists for current language
             localizedFile = doc + "_" + locale.getLanguage() + ext;
-            filePath = getPortletConfig().getPortletContext().getRealPath(".."+localizedFile);
+            filePath = rootPath+ ".."+localizedFile;
             if ( (new File(filePath)).exists() )
                 return localizedFile;
         }