OFStateManager: remove shorthand logging macros

Newer portions of OFStateManager already use the AIM macros directly.
Standardize on that.
OFStateManager: downgrade some INFO logs to VERBOSE

These logs are not useful for a user. The only INFO log left is "Setting
switch DPID to ...".
OFStateManager: call AIM_DIE on LOCI memory allocation failure

This matches the behavior of aim_malloc. I also standardized the message
phrasing.
OFStateManager: downgrade some WARN/ERROR logs to INTERNAL

These logs imply bugs in our code that aren't serious enough for AIM_DIE. We
don't expect them to ever be hit. This is in contrast to the remaining
WARN/ERROR logs which can be triggered by the controller.
OFStateManager: remove TRY macros

The ERROR logs produced by these macros were not user-friendly, and needed to
be INTERNAL logs anyway.
OFStateManager: improve text of INFO, WARN, and ERROR log messages

I added some context to a few messages. I also fixed format string
inconsistencies with the arguments.
OFStateManager: add message name to several gentable log messages
Merge into master from pull request #165:
First pass of logging cleanup for OFStateManager (https://github.com/floodlight/indigo/pull/165)