CASSANDRA-15406 - added progress of streaming in percents in netstats command

[smiklosovic]

No description provided.

[smiklosovic]

This is needed here because without it, the output in netstats look like this, which is wrong:

Repair ec3d7e50-d667-11ea-b3d0-8f5940ba25d7
    /127.0.0.1
        Receiving 3 files, 1890453 bytes total. Already received 2 files (66.67%), 528363 bytes total (53.09%)
            netstats_test/test_table 528363/528363 bytes (100%) received from idx:0/127.0.0.1

New output looks like this:

Repair ec3d7e50-d667-11ea-b3d0-8f5940ba25d7
    /127.0.0.1
        Receiving 3 files, 1890453 bytes total. Already received 2 files (66.67%), 1003673 bytes total (53.09%)
            netstats_test/test_table-1 528363/528363 bytes (100%) received from idx:0/127.0.0.1
            netstats_test/test_table-0 221727/221727 bytes (100%) received from idx:0/127.0.0.1
            netstats_test/test_table-2 253583/529137 bytes (47%) received from idx:0/127.0.0.1

The problem with the original code is that netstats_test/test_table is periodically put into SessionInfo#updateProgress but since we are putting there same "file name", it is replaced so there is ever just one entry in that map.

"file name" is not completely clear here, it is "logical file name" because it is not fully known yet where that will be be actually saved, the original "file name" does not make sense anyway ... I am appeding the sequence number just for the sake of having it unique.

[smiklosovic]

looks like this

netstats_test/test_table 528363/528363 bytes (100%) received from idx:0/127.0.0.1

instead of

netstats_test/test_table 528363/528363 bytes(100%) received from idx:0/127.0.0.1

[smiklosovic]

without this method, the progress was not computed correctly.

[smiklosovic]

replaced by #711