CBD-935:  for current changelog, manage workspace from calling job;

If REPORT_DIR is set as env.var. or passed in as -d <absolute_path>
use that as the REPORTS directory.

Change-Id: Iacb8aeb134c1aa028251f603083914cb2b8a5779
CBD-779:  use '-e' in echo so that email file has correct line endings

Change-Id: Iedb49c3613d469c747bfd847b39fda6cee3906df