Allow removal from failsafe if timeout=0
Allow removal from failsafe if timeout=0

Initialize cache on start adds all sensors to failsafe.
Without being able to hit the removal in updatesensors
this causes the system to go into failsafe and never
remove.

Closes #8

Change-Id: I83f495adb1475abc27dba1734022f28d89e03d8f
Signed-off-by: James Feist <9f787ca2e294231a0bf80dc589f168b98eea7133@linux.intel.com>

openbmc/phosphor-pid-control,openbmc/phosphor-pid-control