Added missing SDTC CDA Extensions, Set 1 (2018)

ETT GG, Errata CDA-2008, Relaxed translation requirement This code SHOULD contain zero or more [0..*] translation such that it SHALL be selected from ValueSet Note Types urn:oid:2.16.840.1.113883.11.20.9.68 DYNAMIC (CONF:3250-16939)

Fixed SITE-3346 Issue, multiple validations reported on invalid section code