Orca consistent xshard schema (#2658)
Orca consistent xshard schema (#2658)

* add util method

* add rayxshard

* fix

* fix

* refactor

* bug fix

* meet comments

* fix error msg

* remove duplicated code

* remove_

* fix style

* fix
yangw1234/BigDL,intel-analytics/BigDL,yangw1234/BigDL,intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL