Fixed test to handle soft exits.

The error conditions in the test now create soft_exit_retries rather than
error conditions, so the tests had to change to wait for those numbers to
go up, and allow the fullsync to finish.

This tests the feature/fix in basho/riak_repl/pull/626
I'm unclear as to why you are specifying NumIndicies as zero here, and the PR doesn't specify either.  Why the change?