avnerl

grpc-go v1.44.0

1

update the following: ``` go v1.16 google.golang.org/grpc v1.44.0 github.com/golang/mock v1.6.0 github.com/hashicorp/consul/api v1.12.0 ``` compatible with `google.golang.org/grpc v1.42.0` and above

enable support for Cassandra multiple data directories

2

cassandra basic featrue: https://docs.datastax.com/en/cassandra/2.1/cassandra/configuration/configCassandra_yaml_r.html#reference_ds_qfg_n1r_1k__data_file_directories example from cassandra.yaml ``` data_file_directories: - /dcos/volume0 - /dcos/volume1 - /dcos/volume2 ``` surprisingly not supported in DCOS.