Updates/docker api

[njthykkathu]

Description:

JIRA Ticket - TSK-2706 Improved the Docker Swarm API, changed the structure and modified some of the methods to make it cleaner and easier to read and use. Updated to test script. Added method to query the replication level of a service from the service id.

Testing instructions:

To test run the following command: ./tools/run_tests.sh sip/execution_control/docker_api/sip_docker_swarm

Types of changes

• [ ] Bug fix (non-breaking change that fixes an issue)
• [x] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] The code follows the code style of this project.
• [ ] The changes require a documentation update.
• [ ] Documentation has been updated accordingly.
• [ ] Tests cover all changes in this PR.
• [ ] All new and existing tests passed.

[codecov[bot]]

Codecov Report

Merging #59 into master will decrease coverage by 0.04%. The diff coverage is n/a.

@@            Coverage Diff            @@
##           master     #59      +/-   ##
=========================================
- Coverage   92.85%   92.8%   -0.05%     
=========================================
  Files          59      59              
  Lines        2210    2210              
=========================================
- Hits         2052    2051       -1     
- Misses        158     159       +1

Impacted Files	Coverage Δ
..._config_db/scheduling/tests/workflow_test_utils.py	87.09% <0%> (-3.23%)	:arrow_down:

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