Allow wrapped script to return its own exit code.

- Makes it easier to respond to import errors.
- Thanks to Johannes Ruscheinski for the suggestion.

import-marc.sh

@@ -143,6 +143,4 @@ RUN_CMD="$JAVA $INDEX_OPTIONS -Duser.timezone=UTC -Dsolr.core.name=$SOLRCORE $EX
 echo "Now Importing $1 ..."
 # solrmarc writes log messages to stderr, write RUN_CMD to the same place
 echo "`date '+%h %d, %H:%M:%S'` $RUN_CMD" >&2
-exec $RUN_CMD
-
+exec $RUN_CMD
\ No newline at end of file
-exit 0