Moved account methods to accountmapper

Changed 'insert' comment to 'update' at database.java - executeUpdate
Revert "Moved account methods to accountmapper"

This reverts commit 17670fe60c193e4ef515570a95398cc4cd03ffdd.
Revert "Revert "Moved account methods to accountmapper""

This reverts commit b65df4fcbace07368c86972b43ba5ac6ce32cfb6.
Merge branch 'develop' of https://github.com/42IN02VTSOb/deslimstemens-GroepB into develop

Conflicts:
	src/helper/Database.java