Not repeated names validations should apply to global elements only

Not repeated names validations should apply to global elements only.

This happens in org.mule.runtime.config.internal.model.ApplicationModel#validateNameIsNotRepeated, where looks for all elements with the "name" attribute and check if there's a collision when it should only look for those who are global elements (aka: flows, configs, etc.).

This bug provokes connectors with MP that contains a parameter which name is "name" fails if the value is repeated in the same mule application