If you can see this page, it means that your Scalr farm configured succesfully.

This app instance IP internal address is 127.0.0.1
You are seeing the default page located at /var/lib/tomcat5.5/webapps/ROOT/index.jsp.

Tomcat tools:

You can control access to the tools by editing /etc/tomcat5.5/tomcat-users.xml
The default password has been generated upon instance start.