[BEAM-2708] Configure BZIP2 to read all "streams"

[bjchambers]

Without this, CompressionMode.BZIP2 only supports "standard" bz2 files
containing a single stream. With this change, BZIP2 also supports bz2 files
containing multiple streams, such as those produced by pbzip2.

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[bjchambers]

R: @jbonofre AND @tgroh

[tgroh]

LGTM as cherry-pick of #3669

[coveralls]

Changes Unknown when pulling 371a89e on bjchambers:pbzip2-cherrypick into ** on apache:release-2.1.0**.

[jbonofre]

LGTM, I'm merging. Thanks !