* Using upacked Spring layers for faster boot
* Added option to pass JAVA_OPT to modify the environment variables in both flavours
* Build support for different hawkbit apps - could be used in future if hawkBit is split in multiple micro-services
* Removed templates and replacing with parameterized (via build ARGs) docker builds
Signed-off-by: Marinov Avgustin <Avgustin.Marinov@bosch.com>