TBLPROPERTIES not updated on Spark Catalog

[osopardo1]

Although the TBLPROPERTIES persisted on the _delta_log, the spark.sessionState.catalog and the SHOW TBLPROPERTIES commands do not load the changes properly.

We have to fix two main things:

1. QbeastTableImpl load of properties. -> It should load the table properties from the underlying log.
2. QbeastCatalog.alterTable should commit the changes also to the getSessionCatalog()

This is a patch before analysing and discussing #354