1.x: TestSubscriber::assertValuesAndClear should reset valueCount

[mlaux]

During the time between calling assertValuesAndClear and providing the next onNext event, the valueCount is inconsistent with the size of the internal values list.

[codecov]

Codecov Report

Merging #5437 into 1.x will decrease coverage by 0.09%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##                1.x    #5437     +/-   ##
===========================================
- Coverage     84.45%   84.36%   -0.1%     
+ Complexity     2890     2888      -2     
===========================================
  Files           291      291             
  Lines         18129    18130      +1     
  Branches       2479     2479             
===========================================
- Hits          15311    15295     -16     
- Misses         1957     1964      +7     
- Partials        861      871     +10

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/rx/observers/TestSubscriber.java	81.91% <100%> (+0.09%)	76 <0> (ø)	⬇️
...java/rx/internal/schedulers/ExecutorScheduler.java	77.46% <0%> (-4.23%)	2% <0%> (ø)
...ternal/operators/OperatorOnBackpressureLatest.java	79.04% <0%> (-3.81%)	3% <0%> (ø)
...rx/internal/operators/OperatorMapNotification.java	77.65% <0%> (-2.13%)	2% <0%> (ø)
src/main/java/rx/subjects/UnicastSubject.java	82.71% <0%> (-1.86%)	9% <0%> (ø)
...in/java/rx/internal/operators/OnSubscribeRedo.java	80.64% <0%> (-1.62%)	16% <0%> (ø)
...n/java/rx/subscriptions/CompositeSubscription.java	76.62% <0%> (-1.3%)	25% <0%> (-1%)
...ava/rx/internal/util/BackpressureDrainManager.java	65.43% <0%> (-1.24%)	19% <0%> (-1%)
...main/java/rx/internal/operators/OperatorMerge.java	85.91% <0%> (-0.93%)	7% <0%> (ø)
...n/java/rx/internal/operators/CachedObservable.java	84.23% <0%> (-0.55%)	6% <0%> (ø)
... and 4 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1dd023f...26696d8. Read the comment docs.