Chained Parameter Matching Support Added

[melihaydogd]

Adds support for chained search parameters in SearchParamMatcher. The following type of parameters will be supported with this PR:

• Observation?context.episodeofcare.condition.code=http://snomed.info/sct|77386006
• Observation?context:Encounter.episodeofcare:EpisodeOfCare.condition:Condition.code=http://snomed.info/sct|77386006

Tests updated.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.47%. Comparing base (497b9f2) to head (19e62c0).
Report is 117 commits behind head on master.

❗ Current head 19e62c0 differs from pull request most recent head 38c48d4

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Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6048      +/-   ##
============================================
+ Coverage     83.39%   83.47%   +0.07%     
- Complexity    26927    27367     +440     
============================================
  Files          1681     1703      +22     
  Lines        103965   106004    +2039     
  Branches      13189    13386     +197     
============================================
+ Hits          86702    88487    +1785     
- Misses        11613    11783     +170     
- Partials       5650     5734      +84     

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