Identify the Maven remote repository type dynamically

[donovanmuller]

So we can use the correct default Dockerfile automatically. Currently if a repository is a Nexus repository is used, you must indicate that the deployer should use the Dockerfile.nexus file instead of the default Dockerfile.artifactory which is the default.

One strategy would be to execute a HTTP request and inspect the response headers. This should indicate which server is being used:

[donovanmuller]

Instead of using a bundled Dockerfile, we should rather move to a S2I build mechanism to build images. This will replace the current Dockerfile solution.

[donovanmuller]

Will be superseded by #36.