test: default pool replica size for test cluster is 1
test: default pool replica size for test cluster is 1

The default replica count for test clusters should be 1.
This was causing the rgw-multisite integration test to
fail because the PGs were attempting to use the default
replication instead of the replication of 1 expected
for test clusters.

Signed-off-by: Travis Nielsen <a8b474fdb3f77f44446f0ab9ddca8147b09b3a9e@redhat.com>

rook/rook,rook/rook,rook/rook,rook/rook,rook/rook