Replicate table with different config

[xiangfu0]

Use case: a table is bootstrapped already, however we want to test if how much perf boost partitioning a column will bring.

The only solution now is to create a new table, regenerate all the segments.

It would be better to have a way to check segment partition mechanism and repartition data if needed.

[Jackie-Jiang]

I would model it into 2 steps:

1. Replicate a table
2. Re-partition the data if necessary

The second step can be very expensive because it requires shuffle the data across segments, so we want to leverage minion to do that.