knoxcli should support batch alias creation

Currently we can only create aliases one by one:

bin/knoxcli.sh create-alias name --cluster cl1  --value value

This is very slow if we want to create multiple aliases.

KnoxCLI should support creating multiple aliases for the same cluster in one batch

bin/knoxcli.sh create-aliases --alias a1 --value v1 --alias a2 --value v2 --alias a3 --value v3