"make build" (called by container-build) now builds all test-images.
This fixes the issue with tests after "container-build" because test-images
were incorrectly built from outside the build container: all build operations
should be made inside "make container-build".
"make clean" uses sudo to "make clean" in solo5 because the container uses
root to create a bunch of files.
Signed-off-by: Ricardo Koller kollerr@us.ibm.com