Bug 1032054 - Refresh button on Monitoring/Calltime page does not move 'last 8 hour' time range

Make CalltimeView implement the refresh mechanism instead of CalltimeTableView

The problem was that #refresh was defined both in Table class and AutoResfresh interface.

(cherry picked from commit 945aeb12cbf8bb3e382d1d222ad54ae1f8f960cf)
Signed-off-by: Libor Zoubek <lzoubek@redhat.com>