Stop storing component files on disk.
Introduce: ds_sds_session_select_tailoring
Use oscap_source to validate tailoring file.
Remove unneeded code.
Use oscap_source to parse tailoring file.
Refactor: Extract function: xccdf_tailoring_import_source
Use oscap_source to import tailoring from session.
Deprecate: xccdf_tailoring_import.
Do not store tailoring component on disk.

Just use oscap_source.
Move CPE dicts from policy to a new child structure.
Move CPE lang_models from policy to a child structure.
Move CPE oval_sessions from policy to a child structure.
Move CPE applicable_platforms from policy to child structure.
Refactor: Extract structure: cpe_session