Use run groups to manage HA go routines (#4671)
Use run groups to manage HA go routines (#4671)

* Use rungroups to spinoff standby go routines

* Update comments

hashicorp/vault,hashicorp/vault,quixoten/vault,joelthompson/vault,joelthompson/vault,hartsock/vault,joelthompson/vault,kingland/vault,rnaveiras/vault,rnaveiras/vault,hashicorp/vault,kingland/vault,rnaveiras/vault,rnaveiras/vault,hashicorp/vault,hashicorp/vault,quixoten/vault,quixoten/vault,hartsock/vault,hartsock/vault,quixoten/vault,hartsock/vault,joelthompson/vault,kingland/vault,hashicorp/vault,kingland/vault,kingland/vault,hartsock/vault,rnaveiras/vault