IDMP-535 - Create GSK example Infanrix Hexa (WIP)

[ElisaKendall]

Description:

1. Create empty example ontology and add it to relevant metadata files
2. Add the Turtle version that Heiner created and an RDF/XML equivalent, both of which include the example disclaimer
3. Augment metadata to reference this ontology

Signed-off-by: Elisa Kendall [email protected]