veyron/services/identity: Code cleanup

- Collapse multiple options into a single, more understandable one
- Remove some dead code
- Get rid of "--generate" and "--identity" flags from identityd
  so that we don't have multiple programs that can generate identities.

Change-Id: I9e34e96708450e40bb43ea8a086523dd963ca304
3 files changed
tree: e8d82f5d721c2e95776108d9b67c8d9a914221e6
  1. examples/
  2. lib/
  3. products/
  4. runtimes/
  5. security/
  6. services/
  7. tools/