Follow mbiddle great idea of replacing round functions with qbcore ones

[Cocodrulo]

Describe Pull request
I think the name is self explanatory. Change the round functions to QBCore ones. (Thanks @mbiddle )

Questions (please complete the following information):

• Have you personally loaded this code into an updated qbcore project and checked all it's functionality? [no]
• Does your code fit the style guidelines? [yes]
• Does your PR fit the contribution guidelines? [yes]