[553054] Refactoring of migration code base

First step of harmonizing cache handling, fixed some Sonar findings and
added the AbstractClassnameConverter.

Change-Id: I8db4d1f50b88842c6aac084a22b183a46fb00b3c
Signed-off-by: Dirk Fauth <dirk.fauth@de.bosch.com>
93 files changed