sentry: Increase shutdown_timeout from 2s to 10s.
sentry: Increase shutdown_timeout from 2s to 10s.

This increases the possible maximum wait time to send exceptions
during shutdown.  The larger value makes it possible to send larger
exceptions, and weather larger network hiccups, during shutdown.  In
instances where a service is crash-looping, it is already not serving
requests reliably, and better ensuring those exceptions are captured
is of significant value.

zulip/zulip,rht/zulip,rht/zulip,rht/zulip,andersk/zulip,kou/zulip,zulip/zulip,eeshangarg/zulip,eeshangarg/zulip,rht/zulip,andersk/zulip,eeshangarg/zulip,rht/zulip,kou/zulip,zulip/zulip,eeshangarg/zulip,andersk/zulip,zulip/zulip,kou/zulip,andersk/zulip,zulip/zulip,rht/zulip,rht/zulip,kou/zulip,kou/zulip,andersk/zulip,zulip/zulip,eeshangarg/zulip,kou/zulip,andersk/zulip,kou/zulip,eeshangarg/zulip,eeshangarg/zulip,andersk/zulip,zulip/zulip