During Recover, we forgot to propagate the disabled flag to the
keyIDMap options like we do during Open. Since we still do propagate
the singleton `ims` which is initialized lazily, if the first
initialization has a different set of labels, it will cause an
inconsistent usage even if the metrics are disabled.
I did this with a dumb editor macro, so some comments changed too.
Also rename root package from platform to influxdb.
In interest of minimizing risk, anyone importing the root package has
now aliased it to "platform" so that no changes beyond imports were
necessary in those files.
Lastly, replace the old platform module to local path /dev/null so that
nobody can accidentally reintroduce a platform dependency while
migrating platform code to influxdb.