Update two common encounter codes for relevancy

[lmd59]

In testing synthea-generated patients against eCQMs, we noticed that synthea encounter codes are often not relevant to the expected valuesets. Some valuesets we would expect to see codes in for common encounters include:

• https://vsac.nlm.nih.gov/valueset/2.16.840.1.113883.3.526.3.1240 (Annual Wellness Visit)
• https://vsac.nlm.nih.gov/valueset/2.16.840.1.113883.3.464.1003.101.12.1001 (Office Visit)
• https://vsac.nlm.nih.gov/valueset/2.16.840.1.113883.3.464.1003.101.12.1008 (Outpatient Consultation)
  These are some of the codes that we might expect to see in real world patient data as patients are expected to calculate into many measure initial populations if they get typical care.

As such, I'm suggesting a full replace of two synthea encounter codes that are used for common encounters:

Code 86013001 "Periodic reevaluation and management of healthy individual (procedure)" from SNOMEDCT selected from valueset "Annual Wellness Visit" 2.16.840.1.113883.3.526.3.1240 to replace 185349003 "Encounter for check up (procedure)" from SNOMED-CT

Code 281036007 "Follow-up consultation (procedure)" from SNOMEDCT selected from valueset "Outpatient Consultation" 2.16.840.1.113883.3.464.1003.101.12.1008 to replace 185347001 "Encounter for problem (procedure)" from SNOMED-CT
Instead, recommending replacing this code with 270427003 ("Patient-initiated encounter (procedure)") from 2.16.840.1.113883.3.526.3.1012 ("Patient Provider Interaction") as it is more closely aligned with the original intent of this code.

Please let me know if you have concerns about these code replacements or other thoughts on how to select the best codes.

[codecov]

Codecov Report

Attention: Patch coverage is 42.85714% with 4 lines in your changes missing coverage. Please review.

Project coverage is 77%. Comparing base (e83ae2f) to head (5e59493).
Report is 10 commits behind head on master.

Files with missing lines	Patch %	Lines
.../main/java/org/mitre/synthea/export/FhirDstu2.java	0%	2 Missing ⚠️
...c/main/java/org/mitre/synthea/export/FhirStu3.java	0%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##             master   #1540   +/-   ##
========================================
  Coverage        77%     77%           
- Complexity     4005    4010    +5     
========================================
  Files           178     178           
  Lines         25169   25199   +30     
  Branches       3591    3594    +3     
========================================
+ Hits          19485   19537   +52     
+ Misses         4557    4529   -28     
- Partials       1127    1133    +6     

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