Add back BUILD_VERSION to Dockerfile

It is needed by drools and drools applications images and
were empty after using new base alpine images.

Change-Id: I76c0e1b01b6edc49e9fc8f69fdef4fe3baa22e48
Issue-ID: INT-998
Signed-off-by: jhh <jorge.hernandez-herrero@att.com>
1 file changed