Merge branch 'issue/491' into release_v1.7.0

CHANGELOG.md

src/libs/convert/contractType.js

src/libs/routes/api.js

src/libs/routes/classCount.js

src/libs/routes/dailyChargeAmount.js

src/libs/routes/infrastructure.js

src/libs/routes/pibpercapita.js

src/libs/routes/schoolInfrastructure.js

src/libs/routes/transport.js

src/libs/routes/user.js