Update build drop script to allow specifying which command packages t…

[johanste]

…o build and exclude

The script will now build all packages matching the commandPackagesToBuild parameter (default * matches all packages) and then remove anything that matches the exceptCommandPackagesToBuild (default to nothing - meaning no command packages will be excluded)

Example: Assuming packages One, Two, One.Test, Two.Test you want to build all packages except the Test packages:

BuildDrop -exceptCommandPackages *.Test

Example: Build single package:

BuildDrop -commandPackagesToBuild One

Example: Build the Two packages (including tests)

BuildDrop -commandPackagesToBuild Two.*

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