Merge branch 'v1.15.7'

CHANGELOG.md

src/libs/convert/initialTraining.js

src/libs/convert/posTraining.js

src/libs/middlewares/id2str.js

src/libs/routes/api.js

src/libs/routes/disciplines.js

src/libs/routes/teacher.js

src/libs/routes/universityEnrollment.js

src/libs/routes/universityLocalOffer.js