extract supplemental data elements from hqmf

[lukoktonos]

This PR adds support for parsing Supplemental Data Elements, which will be used in Hybrid measures.

V3_IG_CQL_HQMF_R1_STU2_2017JUL_Vol1 Section 5.9: Supplemental Data Elements

Hybrid measure found at : https://gitlab.mitre.org/bonnie/internal-documentation/wikis/cql-measures-for-testing

In bonnie, load hybrid measure and do bonnie.mainView._view.measure.get('populations').first().get('supplemental_data_elements') to see what is passed back to bonnie.

extract_populations_and_criteria was partially refactored in order to avoid too much duplication when modifying it for the child module HQMF2CQL. I believe a full refactor would be too much effort for this task and have too many risks associated with it currently.

Pull requests into Health Data Standards require the following. Submitter and reviewer should :white_check_mark: when done. For items that are not-applicable, note it's not-applicable ("N/A") and :white_check_mark:.

Submitter:

• [x] This pull request describes why these changes were made.
• [x] This PR is into the correct branch.
• [x] Internal ticket for this PR: https://jira.mitre.org/browse/BONNIE-1443
• [x] Internal ticket links back to this PR
• [x] Code diff has been done and been reviewed (it does not contain: additional white space, not applicable code changes, debug statements, etc.)
• [x] Tests are included and test edge cases
• [x] Tests have been run locally and pass
• [x] Code coverage has not gone down and all code touched or added is covered.
• [x] Bonnie bundler tests pass
• [x] Bonnie tests pass

Branch	Coverage
master_bonnie	6979 / 7703 LOC (90.6%) covered. 2696 / 7801 LOC (34.56%) covered.
sde_parsing	7016 / 7740 LOC (90.65%) covered.

Note: Coverage report was fixed in this PR so a single complete coverage report is now created.

Cypress Reviewer:

Name: @okeefm

• [x] Code is maintainable and reusable, reuses existing code and infrastructure where appropriate, and accomplishes the task’s purpose
• [x] The tests appropriately test the new code, including edge cases
• [x] You have tried to break the code

Bonnie Reviewer 1:

Name: @holmesie

• [x] Code is maintainable and reusable, reuses existing code and infrastructure where appropriate, and accomplishes the task’s purpose
• [x] The tests appropriately test the new code, including edge cases
• [x] You have tried to break the code

Bonnie Reviewer 2:

Name: @mayerm94

• [x] Code is maintainable and reusable, reuses existing code and infrastructure where appropriate, and accomplishes the task’s purpose
• [x] The tests appropriately test the new code, including edge cases
• [x] You have tried to break the code

[holmesie]

Also seeing this error:

HQMF2CQLTest
  test_2                                                          PASS (0.14s)
  test_supplemental_data_element_parsing                         ERROR (0.00s)
Errno::ENOENT:         Errno::ENOENT: No such file or directory @ rb_sysopen - test/fixtures/hqmf/cql/CCDELookback_v5_4_eCQM.xml
            /home/travis/build/projectcypress/health-data-standards/test/unit/hqmf/cql/hqmf_cql_test.rb:37:in `initialize'
            /home/travis/build/projectcypress/health-data-standards/test/unit/hqmf/cql/hqmf_cql_test.rb:37:in `open'
            /home/travis/build/projectcypress/health-data-standards/test/unit/hqmf/cql/hqmf_cql_test.rb:37:in `test_supplemental_data_element_parsing'