[BEAM-3049] Relocate everything shaded by Java SDK harness

[kennknowles]

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R: @herohde

Verified that everything in the shaded jar begins with org.apache.beam.fn.harness which is the current namespace adopted by the SDK harness code.

[kennknowles]

BTW the change from repackaged to private is deliberate, reflecting the whole point that these are private dependencies.

[kennknowles]

run go precommit

[tgroh]

LGTM

[tgroh]

I would grep or sed for uses of repackaged and replace them as appropriate.

[coveralls]

Changes Unknown when pulling 0089093 on kennknowles:harness-shading into ** on apache:master**.