Add Multi-source bindings editing feature to VDB Editor

Teiid VDB's support multi-source bindings for each source (PHYSICAL) model.     The VDB editor was modified to allow users to add/delete/edit Source objects comprised of a name, connection-jndi-name and translator-name.     User selects a model in the Model table on the left     Model details are displayed in the Model Details tab on the right     On the Source Bindings Definition tab on the right...         Check the "Multi-source" option to allow adding multiple source definitions         Check the "Add Column" box to "make the multi-source column present in the system metadata"         Enter a "Column Alias" value if you wish to override the default name : SOURCE_NAME Note that multi-source definition is not yet a feature outside of the VDB Editor