scripted-diff: Move previous_release.py to test/get_previous_releases.py

-BEGIN VERIFY SCRIPT-
OLD=contrib/devtools/previous_release.py
NEW=test/get_previous_releases.py
sed -i "s|$OLD|$NEW|g" $(git grep -l $OLD)
git mv $OLD $NEW
-END VERIFY SCRIPT-

ci/test/05_before_script.sh

@@ -48,6 +48,6 @@ if [ -z "$NO_DEPENDS" ]; then
 fi
 if [ -n "$PREVIOUS_RELEASES_TO_DOWNLOAD" ]; then
   BEGIN_FOLD previous-versions
-  DOCKER_EXEC contrib/devtools/previous_release.py -b -t "$PREVIOUS_RELEASES_DIR" "${PREVIOUS_RELEASES_TO_DOWNLOAD}"
+  DOCKER_EXEC test/get_previous_releases.py -b -t "$PREVIOUS_RELEASES_DIR" "${PREVIOUS_RELEASES_TO_DOWNLOAD}"
   END_FOLD
 fi