Add MetricsService#createEvent(string, long) / or replace int version

[detsam]

In practice, there is most of timing / quantities values that are has type of long. So, at the moment there is permanent cast from long to int type.

I want suggest to add long version of "MetricsService#createEvent" method, or replace int version.

There is no any downgrade of performance is expected, cos JVM JIT is smart enough to keep int where possible, even over smart type casts.

So that we would support wide range of values just for free.