test(5000-tables): change seed for 5000 tables test
test(5000-tables): change seed for 5000 tables test

We ran into problematic nemesis for 5000 tables test:
https://github.com/scylladb/scylla-manager/issues/3237

This commit switch nemesis seed to make this test with different nemesis
set.

scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests