[SPARK-8954] [Build]
1. Remove unneeded deb repository from Dockerfile to fix build error in docker.
2. Remove unneeded /var/lib/apt/lists/* after install to reduce the docker image size (by ~30MB).
Author: yongtang <yongtang@users.noreply.github.com>
Closes#7346 from yongtang/SPARK-8954 and squashes the following commits:
36024a1 [yongtang] [SPARK-8954] [Build] Remove unneeded /var/lib/apt/lists/* after install to reduce the docker image size (by ~30MB)
7084941 [yongtang] [SPARK-8954] [Build] Remove unneeded deb repository from Dockerfile to fix build error in docker.
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