RFR: Refactor host interfaces

[Robin Westberg]

Hi all,

Please review this refactoring of the host module interfaces.

Best regards,
Robin

----------------

Commits:
 - 24d3ceb7: Split host interface
 - ef47f7f6: Extract RestRequest and URIBuilder to a network module
 - 05543918: Rename host interfaces' methods

Changes: https://git.openjdk.java.net/skara/pull/207/files
 Webrev: https://webrevs.openjdk.java.net/skara/207/webrev.00
  Stats: 2415 lines in 138 files changed: 529 ins; 361 del; 1525 mod
  Patch: https://git.openjdk.java.net/skara/pull/207.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/207/head:pull/207

PR: https://git.openjdk.java.net/skara/pull/207