Data from identical instruments must be aggregated

[ocelotl]

From the spec:

The implementation MUST aggregate data from identical Instruments together in its export pipeline.

Make sure this is implemented and that a specific test for this requirement exists.

[aabmass]

@ocelotl @lzchen sorry I had to run from the SIG meeting. What was the resolution of this? Can we not implement this by returning the same instance of Meter from MeterProvider.get_meter() with the same arguments, and likewise for instruments?

[ocelotl]

@ocelotl @lzchen sorry I had to run from the SIG meeting. What was the resolution of this? Can we not implement this by returning the same instance of Meter from MeterProvider.get_meter() with the same arguments, and likewise for instruments?

Oh, yes, we can, I am reimplementing to do exactly that ✌️