BUG-614: convert RuntimeCodeSpecification

This migrates RuntimeCodeSpecification from xtend to Java, increasing
its efficiency.

Change-Id: I00b3ab7f3a47e0d3fc71e55b4bec99364bfa8e5f
Signed-off-by: Robert Varga <rovarga@cisco.com>
Merge "BUG-614: convert RuntimeCodeSpecification"