Ground work for hpa validation

Added the declarative schema for hpa validation. This is the ground
layering work for hpa validation.

Change-Id: I2ff30489e191ecf187711e1025f6e3faee9946c3
Issue-ID: VNFSDK-194
Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>
8 files changed