### What changes were proposed in this pull request?
This PR allows `bin/spark-submit --version` to show the correct information while the previous versions, which were created by `dev/create-release/do-release-docker.sh`, show incorrect information.
There are two root causes to show incorrect information:
1. Did not pass `USER` environment variable to the docker container
1. Did not keep `.git` directory in the work directory
### Why are the changes needed?
The information is missing while the previous versions show the correct information.
### Does this PR introduce any user-facing change?
Yes, the following is the console output in branch-2.3
```
$ bin/spark-submit --version
Welcome to
____ __
/ __/__ ___ _____/ /__
_\ \/ _ \/ _ `/ __/ '_/
/___/ .__/\_,_/_/ /_/\_\ version 2.3.4
/_/
Using Scala version 2.11.8, OpenJDK 64-Bit Server VM, 1.8.0_212
Branch HEAD
Compiled by user ishizaki on 2019-09-02T02:18:10Z
Revision 8c6f8150f3
Url https://gitbox.apache.org/repos/asf/spark.git
Type --help for more information.
```
Without this PR, the console output is as follows
```
$ spark-submit --version
Welcome to
____ __
/ __/__ ___ _____/ /__
_\ \/ _ \/ _ `/ __/ '_/
/___/ .__/\_,_/_/ /_/\_\ version 2.3.4
/_/
Using Scala version 2.11.8, OpenJDK 64-Bit Server VM, 1.8.0_212
Branch
Compiled by user on 2019-08-26T08:29:39Z
Revision
Url
Type --help for more information.
```
### How was this patch tested?
After building the package, I manually executed `bin/spark-submit --version`
Closes#25655 from kiszk/SPARK-28906.
Authored-by: Kazuaki Ishizaki <ishizaki@jp.ibm.com>
Signed-off-by: Sean Owen <sean.owen@databricks.com>
8d1b5ba766