Extract descriptor fields for Instrument and use autovalue

[bogdandrutu]

No description provided.

[codecov-io]

Codecov Report

Merging #865 into master will decrease coverage by 0.05%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #865      +/-   ##
============================================
- Coverage     82.29%   82.23%   -0.06%     
  Complexity      839      839              
============================================
  Files           110      111       +1     
  Lines          2920     2882      -38     
  Branches        258      253       -5     
============================================
- Hits           2403     2370      -33     
  Misses          401      401              
+ Partials        116      111       -5

Impacted Files	Coverage Δ	Complexity Δ
.../io/opentelemetry/sdk/metrics/AbstractCounter.java	91.66% <100%> (ø)	9 <0> (ø)	⬇️
...try/sdk/metrics/AbstractInstrumentWithBinding.java	68% <100%> (ø)	5 <1> (ø)	⬇️
...a/io/opentelemetry/sdk/metrics/LongMeasureSdk.java	75% <100%> (-3.58%)	5 <0> (ø)
.../io/opentelemetry/sdk/metrics/AbstractMeasure.java	91.66% <100%> (ø)	9 <0> (ø)	⬇️
.../io/opentelemetry/sdk/metrics/LongObserverSdk.java	91.66% <100%> (-2.09%)	2 <0> (ø)
...a/io/opentelemetry/sdk/metrics/LongCounterSdk.java	75% <100%> (-3.58%)	5 <0> (ø)
...o/opentelemetry/sdk/metrics/DoubleObserverSdk.java	91.66% <100%> (-2.09%)	2 <0> (ø)
...io/opentelemetry/sdk/metrics/DoubleCounterSdk.java	75% <100%> (-3.58%)	5 <0> (ø)
...pentelemetry/sdk/metrics/InstrumentDescriptor.java	100% <100%> (ø)	2 <2> (?)
...io/opentelemetry/sdk/metrics/DoubleMeasureSdk.java	75% <100%> (-3.58%)	5 <0> (ø)
... and 3 more

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[bogdandrutu]

@jkwatson PTAL :)

[jkwatson]

👍