KER-259: Add ability to turn off automatic portal container restart on portlet application redeploy when -Dexo.product.developing=true is used

Problem analysis
	- The kernel reloaded the portal container even when a web app containing only resources such as portlets was reloaded

Fix description
	- Now we check if the web app that has been reloaded is known as a PortalContainerConfigOwner if so the kernel will reload the portal container otherwise it won't do anything
KER-274: Warn when a PortalContainerDef contains a non-existent dependency.

Fix description:
	- Check if a dependency exists and raise a warning when it does not appear in existent dependencies list.