Add schema name to metadata validation messages

Currently metadata validation messages don't contain schema name, so when working with lot of schemas it may be difficult to find out problematic element. For example, if table SOME_TABLE has no columns then
org.teiid.query.metadata.MetadataValidator.MinimalMetadata.execute() will log following error message:
TEIID31071 Invalid table; Table SOME_TABLE has no columns defined
And there's no ability to detect later to which schema problematic table belongs.

I suggest to append schema name - either by simple concatenation in MetadataValidator.java:

metadataValidator.log(report, model, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31071, scmena.getName()+"."+t.getName()));

or by changing message bundle i18n.properties:

TEIID31071=Invalid table; Table

.

has no columns defined

and providing message parameters in MetadataValidator.java:

metadataValidator.log(report, model, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31071, scmena.getName(), t.getName()));

There are also another validation messages in MetadataValidator.java which could be improved in similar way.