FM2-429 : Added support for Instance level $everything operation in R3

[LuGO0]

Description of what I changed

Issue I worked on

see https://issues.openmrs.org/browse/FM2-429

Checklist: I completed these to help reviewers :)

• [ ] My IDE is configured to follow the code style of this project.

  No? Unsure? -> configure your IDE, format the code and add the changes with git add . && git commit --amend

• [ ] I have added tests to cover my changes. (If you refactored existing code that was well tested you do not have to add tests)

  No? -> write tests and add them to this commit git add . && git commit --amend

• [ ] I ran mvn clean package right before creating this pull request and added all formatting changes to my commit.

  No? -> execute above command

• [ ] All new and existing tests passed.

  No? -> figure out why and add the fix to your commit. It is your responsibility to make sure your code works.

• [ ] My pull request is based on the latest changes of the master branch.

  No? Unsure? -> execute command git pull --rebase upstream master

[codecov[bot]]

Codecov Report

Merging #379 (5a50706) into master (1ef6fa9) will decrease coverage by 0.00%. The diff coverage is 75.00%.

@@             Coverage Diff              @@
##             master     #379      +/-   ##
============================================
- Coverage     80.83%   80.82%   -0.00%     
- Complexity     2264     2267       +3     
============================================
  Files           207      207              
  Lines          6055     6059       +4     
  Branches        711      711              
============================================
+ Hits           4894     4897       +3     
  Misses          743      743              
- Partials        418      419       +1     

Impacted Files	Coverage Δ
...r2/providers/r3/EncounterFhirResourceProvider.java	90.91% <75.00%> (-2.19%)	:arrow_down:

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