log cgroup name and init method
Summary:
This diff
1. logs the cgroup name to scuba
2. logs name of the init method, e.g. "lazy saved_state init", etc.
3. creates a new memory table for full init when aved-state init falls back to full init. [Here](https://www.internalfb.com/intern/sandcastle/log/?instance_id=
18014398861907462&step_id=
18014401822497431&step_index=14&name=server-log) is an example, where saved-state init has fallen back to full init but the Memory stats table still shows "LAZY SAVED-STATE INIT"
Differential Revision:
D25350480
fbshipit-source-id:
cec82cb7f674fe696ca5ed66ab4da1432bf70272