Add the ability to manually specify addtional CPE entries to be checked.

[gordoninnes]

This change allows adding CPEs to be included in analysis for dependencies that might not be picked up during scans.

For example to add in a dependency on PostgresSQL:

dependencyCheck {
  additionalCpes {
    postgreSql {
      description = "PostgreSQL"
      cpe = "cpe:2.3:a:postgresql:postgresql:${postgresqlVersion}:*:*:*:*:*:*:*"
     }
  }
}

[jeremylong]

I have some larger work to complete in the core library before I can review this PR.

[gordoninnes]

No worries! I appreciate you having a look. I've used these changes locally but would be nice not to have to maintain our own separate build. Hopefully it's a useful feature for others.

[jeremylong]

Just a couple of minor changes will help with some of the reports.

[gordoninnes]

Thanks. I've committed those changes.

[jeremylong]

LGTM

[gordoninnes]

Had to push a fix to get your changes in properly 😞 Can you review again please?

[jeremylong]

LGTM

[jeremylong]

sorry about the delay - this is being released today. I've unfortunately had a ton of other work outside of my OSS contributions consuming my time. Thanks again for the PR.