Issue #3322917 metapackage test

Closes #3322917

added 3 commits

• dfae28cb - forgot to copy testSubModules from other branch
• aa0614f2 - fix asserts
• 0fff1200 - refactor and expand comments

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added 1 commit

• 8d58daa2 - fixed xml comment

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added 8 commits

• efe43b63 - 1 commit from branch project:3.0.x
• 378d64ca - copied from 3322917-create-a-testor
• f8c6aa37 - update test to pass
• 03283f37 - forgot to copy testSubModules from other branch
• e8e798b8 - fix asserts
• f6fa6d62 - refactor and expand comments
• 6b6d6c5e - fixed xml comment
• 18888b06 - update to renamed makePackageManagerTestApiRequest

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added 2 commits

• 3c82411b - addressed some of phenaproxima review
• be0268fe - remove the need for class properties

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added 1 commit

• 42f425f1 - use projects_dir var

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added 1 commit

• 2d1c9b8b - clean up

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I find it extremely confusing that we have build_test_projects/main_module/main_module_submodule as a directory, AND build_test_projects/main_module_submodule as its own directory. We gotta explain why this is.

changed this line in version 8 of the diff