allow null type for primitives

(to be consistent with validPrimitiveTypes()
in BluePrintTypes)
TODO: refactor that as well.
This should fix the issue with missing values
in output-type-mapping breaking execution.

Issue-Id: CCSDK-1614

Signed-off-by: Oleg Mitsura <oleg.mitsura@amdocs.com>
Change-Id: Ia209a3bfcdc5fc2ef1179bd46669be2d57426749
1 file changed