camel-kamelet don't check for duplicate id routes during route creation from a template

If for any reason a route created from a camel-kamelet template has a conflicting id (i.e. an id equal to any other route in the same camel context) a weird error occur:

org.apache.camel.FailedToStartRouteException: Failed to start route test because of null

instead of the real cause, these makes diagnosing the problem quite hard.