Fix unclosed rocks iterators

[evanmcc]

suspect that the catch logging is going to be noisy, we might want to add a version of the macro that allows us not to log.

in any case, we want to log at warning, since error writes to the error log with fsync

[xandkar]

suspect that the catch logging is going to be noisy, we might want to add a version of the macro that allows us not to log.

added the an app env var to disable the logging.

in any case, we want to log at warning

switched it to warning.

since error writes to the error log with fsync

TIL!