Show BookKeeper Stream Storage Tables

[eolivelli]

Pulsar (Functions) Uses BookKeeper Stream Storage in order to store functions state.
Currently it is very hard to inspect the content of this subsystem, that is not enabled by default (if you run bin/pulsar standalone you will get a working BK cluster with Stream Storage up and running)

It would be very nice to see in BKVM:

• tables
• metadata information about each table

[eolivelli]

relevant commands using BookKeeper Shell:
bin/bkctl tables create foo
bin/bkctl tables get foo
bin/bkctl table put foo key value
bin/bkctl table get foo key