Rename contrib to extensions

[iNikem]

Closes #1100

[codecov]

Codecov Report

Merging #1335 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1335      +/-   ##
============================================
- Coverage     92.30%   92.29%   -0.02%     
+ Complexity      917      914       -3     
============================================
  Files           118      118              
  Lines          3209     3204       -5     
  Branches        262      261       -1     
============================================
- Hits           2962     2957       -5     
  Misses          165      165              
  Partials         82       82              

Impacted Files	Coverage Δ	Complexity Δ
...ions/trace/export/DisruptorAsyncSpanProcessor.java	86.00% <ø> (ø)	10.00 <0.00> (?)
...k/extensions/trace/export/DisruptorEventQueue.java	83.51% <ø> (ø)	12.00 <0.00> (?)
...ions/trace/jaeger/sampler/JaegerRemoteSampler.java	72.54% <ø> (ø)	9.00 <0.00> (?)
...ions/trace/jaeger/sampler/PerOperationSampler.java	0.00% <ø> (ø)	0.00 <0.00> (?)
...k/extensions/trace/jaeger/sampler/RateLimiter.java	94.11% <ø> (ø)	4.00 <0.00> (?)
...ions/trace/jaeger/sampler/RateLimitingSampler.java	63.63% <ø> (ø)	6.00 <0.00> (?)
...ensions/trace/jaeger/sampler/SamplingDecision.java	100.00% <ø> (ø)	3.00 <0.00> (?)
...emetry/sdk/extensions/otproto/TraceProtoUtils.java	81.48% <ø> (ø)	6.00 <0.00> (?)
...o/opentelemetry/common/ImmutableKeyValuePairs.java	88.37% <0.00%> (-0.99%)	15.00% <0.00%> (-3.00%)
...ntelemetry/sdk/trace/RecordEventsReadableSpan.java	92.57% <0.00%> (-0.09%)	62.00% <0.00%> (ø%)
... and 3 more

---

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[carlosalberto]

Overall good, but I'm wondering whether we should adjust the names for some of these packages, i.e. OpenTelemetry Contrib Auto Annotations became OpenTelemetry Extension Auto Annotations doesn't quite feel right ;)

[iNikem]

Overall good, but I'm wondering whether we should adjust the names for some of these packages, i.e. OpenTelemetry Contrib Auto Annotations became OpenTelemetry Extension Auto Annotations doesn't quite feel right ;)

All suggestions are welcomed.

[jkwatson]

looks like it needs a rebase. I like it, though!

[iNikem]

looks like it needs a rebase. I like it, though!

Done.

[carlosalberto]

Since it's a relatively important change, lets wait a little while before merging it, so people can comment/review ;)

[iNikem]

Ready to merge?