Trying to use the repl features before newly started nodes have
riak_repl completely initialized leads to all sorts of nasty crashes and
noise. Frequently it makes fullsync stuck forever, which makes a lot of
the tests fail.
This also tweaks the AAE fullsync tests to remove assumptions about
failure stats when AAE transient errors occur. The behavior in the
handling of those errors has changed recently with the introduction of
soft exits.
The heartbeat timeout enforcement was recently updated to be
specified in seconds to match the documentation for that option. The
repl_rt_heartbeat test has since been failing since it still specified
the timeout in milliseconds. This change makes the test use seconds
for the heartbeat timeout gets the test passing again.
