Deprecate TabletId class

[milleruntime]

Would be good to utilize the new TableId class that is being put into the API. Currently TabletId already has a getTableId method that returns Text object but (cause its java) it would be awkward to have a getter with similar name that returns TableId. It would probably be best to just deprecate this whole class in favor of a class without any Text types.

[milleruntime]

Deprecating org.apache.accumulo.core.data.TabletId would also effect the Locations interface in o.a.a.core.client.adamin.

[milleruntime]

After looking into this further, I don't think this is a good idea. TabletId, although the name isn't great and is really close to TableId, provides additional information that users can't get with just the id... information from our internal KeyExtent that users can't get anywhere else.