Adding update snapshots to FOSSA maven builds

Before running the fossa scans, we use mvn install to make sure the .m2 repository is up to date with all dependencies. During this
process, we should update snapshots, because we are still using services that depend on SNAPSHOT libraries.

Without this, the cache from the runner would be used, which isn't always up to date.

Note: the compile-and-unit-test job already does this.
1 job for add-update-snapshots in 7 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Document
passed generate-docs #453099

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