Handle TODOs in the project

[MartinFlores751]

Please open an issue for this TODO.

Originally posted by @korydraughn in #14 (comment)

TODOs found through a quick grep:

dev@2cf6b8fd7642:/workspaces/policy$ git grep -i -n todo
framework/include/irods/policy_composition_framework_policy_engine.hpp:194:            // TODO :: add more context to these errors for the user
packaging/test_plugin_policy_engine-data_verification.py:178:# TODO :: add iadmin modrepl for Fail Test
packaging/test_plugin_policy_engine-data_verification.py:387:# TODO :: add iadmin modrepl for Fail Test
packaging/test_plugin_policy_engine-data_verification.py:416:# TODO :: Add MungeFS for Fail Test
packaging/test_plugin_policy_engine-data_verification.py:445:# TODO :: Add MungeFS for Fail Test
parameter_substitution.hpp:105:    //TODO :: possibly need to return an error