[rancid] Filtering out flash dir and time change events

[heasley]

Thu, Jul 27, 2017 at 10:53:12AM -0400, Doug Hughes:
> > - !Time: Thu Jul 27 07:12:05 2017
> >
> > + !Time: Thu Jul 27 08:12:10 2017
> >

this is the stupid command timestamping.  on ios-xr

RP/0/RSP0/CPU0:device#term e p time
RP/0/RSP0/CPU0:device#show ver
Thu Jul 27 17:42:21.981 UTC

just turn it off on the device.

for ios-exr's admin bug, there is a filte in the alpha rancid code.