Time value updates

[swalker2m]

Many of the instrument parameter enums represent time as a Java Duration but we've decided that a Scala FiniteDuration is more in line with most APIs so they should be switched. Also, we represent time values in ms in the database in places where they are naturally fractional seconds so that should be switched.

@cquiroz's #887 adds conversion code for milliseconds so we can use that now.