Added script execution checks
use os.walk instead of shelling out to find command
simplify script to remove seemingly useless main().
Refactoring common logic from import-local-repo into a new module called 'kojimaven', then adding logic I clipped from import-maven script and the underlying koji cli implementation that import-maven shells out to. The result should be a completely api-driven module for importing maven builds (though it doesn't have logic for getting maven artifacts from a URL yet).

Conflicts:
	scripts/build/import-local-repo
moving new kojimaven module to scripts/build