Feature 2667: rrd fix now atomic move + other fixes
Feature 2667: rrd fix now atomic move + other fixes

- If file does not exist, prints out warning
- fix_rrd now backs up files automatically
- Now restores to a temp location then moves to the real location atomically
- Noticed that rrd was not finding entry rrds correctly, now fixed

bbockelm/glideinWMS,bbockelm/glideinWMS,bbockelm/glideinWMS,bbockelm/glideinWMS