US Core 7 Support

[Jammjammjamm]

This branch updates exported resources to include US Core 7 profiles.

• Pregnancy Status Observation added
• Fixed an issue preventing Sexual Orientation Observations from being created
• Many outdated code displays are updated. The script to automatically update code displays does not catch everything that needs updating, but I haven't had a chance to investigate further.

The following profiles in US Core 7 are not supported:

• Condition - Problems and Health Concerns - Currently Encounter Diagnosis is used for all of the conditions. I think that those should probably be Problems and Health Concerns, but I'm not an expert in the distinction, and that would leave Encounter Diagnosis unused
• Coverage - Contained coverage resources are used
• MedicationDispense
• ServiceRequest
• RelatedPerson
• Specimen
• QuestionnaireResponse (this is not necessarily required for USCDI)
• Observation - Average Blood Pressure
• Observation - Care Experience Preference
• Observation - Treatment Intervention Preference
• Observation - Pregnancy Intent

[dehall]

Looks good to me. Tested by generating a small sample dataset and validating against with the latest validator (java -jar ~/Downloads/validator_cli_6_7_4.jar -ig "hl7.fhir.us.core#7.0.0" -extension any -display-issues-are-warnings ./output/fhir), the only reported errors* were unrelated and occur on master too, so not something to address here. Even if this doesn't cover everything in US Core 7, that's consistent with previous updates, and we can add more if someone finds something important is missing.

* = The unrelated error, repeated many times, is Error @ Bundle.entry[448].resource/*ImagingStudy/603530aa-0143-9362-b9d7-8813a585eb29*/.series[0].modality.system (line 42092, col10): The Coding references a value set, not a code system ('http://dicom.nema.org/medical/dicom/current/output/chtml/part16/sect_CID_29.html')