### What changes were proposed in this pull request?
As title
### Why are the changes needed?
This PR addresses a conflict in the sbt generated POM by replacing `pomExtra` with `scmInfo`
```diff
<name>org.apache.celeborn</name>
</organization>
<scm>
- <url>https://github.com/cfmcgrady/incubator-celeborn</url>
- <connection>scm
|
||
|---|---|---|
| .. | ||
| AddMetaInfLicenseFiles.scala | ||
| build.properties | ||
| BuildTools.scala | ||
| CelebornBuild.scala | ||
| JDKTools.scala | ||
| plugins.sbt | ||
