Rename keystone-all daemon to keystone

Keystone is a special snowflake and has an
oddly named binary (keystone-all), to make it
easier to understand just name that binary
'keystone' instead.

Fixes bug: 1237476

Change-Id: Iabc21a0f3ad866338b3d79a3079a43d8802c5d61
Merge "Rename keystone-all daemon to keystone"