tools: Expose configuration values for geo-rep sync

Expose configuration values for geo-rep sync:
- GlusterRefreshRateGeoRepStatus
- GlusterRefreshRateGeoRepDiscovery

Change-Id: Iea02f848bc7d23a226db320012a4b936888ac019
Signed-off-by: Sahina Bose <sabose@redhat.com>