Increase attempts to delete archive policy

We have suspected autoscaling tests failing, because the "gabbilive" archive policy can't be
deleted in time. Yet the recent experiments does not support it. This bumps the number of
retries from 360 to 1000 attempts to avoid this happening in the gate where the environment
can be slightly different.

Change-Id: I0936c9c6a12af0ea8ca2d8cb24f0807132125d45
1 file changed