Support listing the SSH keys of an account via REST

By GET on /accounts/<account-id>/sshkeys it is now possible to retrieve
the SSH keys of an account.

The WebUI is adapted to use the new REST endpoint to retrieve the SSH
keys. The old RPC for this is deleted.

Change-Id: Iea83e77acbc1bb28c2bea0b5a3972b78acb22d62
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
10 files changed