tests: Run network retries test for many retries directly
tests: Run network retries test for many retries directly

This runs a test involving many retries for the --network-retries
option directly rather than inside a conditional statement, so that
the command does not silently fail and allow the test to continue
running.

Closes: #1673
Approved by: jlebon

GNOME/ostree,GNOME/ostree,GNOME/ostree,GNOME/ostree,GNOME/ostree