Refactor OntoUploader into an Interface

[lewismc]

The OntoUploader.java code should be refactored into an Interface with individual implementations for both ESIP COR AND ESIP Semantic Portal. The implementation should be driven by a configuration file which is read from src/main/resources via an InputStream. All credentials for interfacing with the various ontology repositories should also then be added there as well.

[graybeal]

You may find useful a bit of CEDAR's terminology server (https://github.com/metadatacenter/cedar-terminology-server), particular the part that submits value sets to BioPortal. (Unfortunately, no code in there to submit ontologies to BioPortal.)
API documentation at https://terminology.metadatacenter.net/api/, particularly https://terminology.metadatacenter.net/api/#!/Value32sets/put_value_sets_id for submitting the value sets.

[lewismc]

@graybeal thank you Sir.

[lewismc]

@Yongyao do you want to take this issue on? I am working on #13

[lewismc]

After we do that, I think we should release 0.1 to Maven Central.