Add VNF-Macro-Create and VNF-Macro-Delete

Add VNF-Macro-Create and VNF-Macro-Delete

These macros enable creation and deletion of a vnf with vfmodules
for an existing service instance using building blocks.

Also:
- No longer force alaCarte=true for these use cases
- Fix broken vfModule sorting logic for baseFirst/baseLast
- Minor refactoring replacing String literals with constants

Issue-ID: SO-3635
Signed-off-by: Jozsef Csongvai <jozsef.csongvai@bell.ca>
Change-Id: I16975f3561f2d978dede20679927ac3531def900