Add QARanker Python example to integration (#1103)
Add QARanker Python example to integration (#1103)

* add qaranker integration

* minor

* fix

* fix

* add pip test

* fix anomaly detection

yangw1234/BigDL,intel-analytics/BigDL,yangw1234/BigDL,yangw1234/BigDL,yangw1234/BigDL,intel-analytics/BigDL,intel-analytics/BigDL,intel-analytics/BigDL