5.1.2.2. Removing all the hard coded rest context name (i.e. "rest")

Now if we need to get the rest context name (even in a standalone mode: in case of standalone mode the default value will be returned), we can:

If the component is instantiated by Pico container, you can add in the constructor of your component, the component ExoContainerContext, then call the method getRestContextName()
If the component is not instantiated by Pico container, you can call at runtime the static method PortalContainer.getCurrentRestContextName()