
When blacklisting all servers from the primary role, the yaql expression to get the bootstrap_server_id value fails as it tries to index the list at the 0'th element. In this case, default the bootstrap_server_id value to a constant string which won't match any actual server id's. Change-Id: Ibb26245156675f64709bab075875ce4b498b4db6 Closes-Bug: #1785665