message: API: Refactor DuplicationController imports
diff: -import {
  - BodyParam, Post, Param, JsonController, UseBefore, Authorized, CurrentUser,
  - InternalServerError, ForbiddenError
  -} from 'routing-controllers';
  +import {BodyParam, Post, Param, JsonController, UseBefore, Authorized, CurrentUser, ForbiddenError} from 'routing-controllers';
  import passportJwtMiddleware from '../security/passportJwtMiddleware';
  import {IUser} from '../../../shared/models/IUser';
  import {IUnit} from '../../../shared/models/units/IUnit';
  @@ -12,7 +9,6 @@ import {ILecture} from '../../../shared/models/ILecture';
  import {ICourse} from '../../../shared/models/ICourse';
  import {IDuplicationResponse} from '../../../shared/models/IDuplicationResponse';
  import {extractSingleMongoId} from '../utilities/ExtractMongoId';
  -import {errorCodes} from '../config/errorCodes';
  @JsonController('/duplicate')
  