necessity to overwrite exisiting platform modules

Sometimes it is necessary to override an existing jar file from the platform, e.g.

• I have a dmx-platform feature branch with some changes in dmx-accesscontrol
• dmx image already contains dmx-accesscontrol but in its pristine form
• I need to check whether a combination of my changes in dmx-accesscontrol and a bunch of external modules work properly

Problem:

• at the moment there is no simple way to replace the built-in dmx-accesscontrol with mine

Solution:

• the image offers a way similar to "plugins" folder where I can put jars of the platform and when the container is run, those jars will overwrite the built-in ones