remove legacy namespacing support

[araddon]

Originally, i made a big mistake on left.right namespacing identities, and allowed a bad format. Need to find a way to back this out. utility to find/remove?

particularly in generators/elasticsearch

# legacy
`key_name.field value` -> "key_name", "field value" 
# correct future state
`key_name.field value` -> "", "key_name.field value"