Fixes an issue with the tests whereby the RAM memory configuration
files were not being used, and could not be passed to the mcuboot
image.
Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>
Adds a test that exercises the boot mode (retention subsystem)
feature to check that an application can successfully boot into
mcuboot's serial recovery mode.
Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>