1.x: increase timeout of some tests

[akarnokd]

Increase timeouts of tests that started failing due to slower CI.

[codecov]

Codecov Report

Merging #5471 into 1.x will increase coverage by 0.06%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                1.x    #5471      +/-   ##
============================================
+ Coverage     84.46%   84.52%   +0.06%     
- Complexity     2891     2893       +2     
============================================
  Files           291      291              
  Lines         18130    18130              
  Branches       2478     2478              
============================================
+ Hits          15313    15324      +11     
+ Misses         1955     1951       -4     
+ Partials        862      855       -7

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/rx/observables/AsyncOnSubscribe.java	68.35% <ø> (ø)	5 <0> (ø)	⬇️
...ava/rx/internal/operators/OperatorMaterialize.java	85.24% <0%> (-3.28%)	3% <0%> (ø)
.../java/rx/internal/util/unsafe/MpscLinkedQueue.java	87.87% <0%> (-3.04%)	10% <0%> (-1%)
...n/java/rx/internal/operators/CachedObservable.java	83.69% <0%> (-1.09%)	6% <0%> (ø)
...ain/java/rx/internal/operators/OperatorReplay.java	83.17% <0%> (+0.39%)	15% <0%> (ø)	⬇️
...main/java/rx/internal/operators/OperatorMerge.java	87.06% <0%> (+0.46%)	7% <0%> (ø)	⬇️
...n/java/rx/subscriptions/CompositeSubscription.java	77.92% <0%> (+1.29%)	26% <0%> (+1%)	⬆️
...n/java/rx/subjects/SubjectSubscriptionManager.java	82.85% <0%> (+1.42%)	16% <0%> (+1%)	⬆️
.../rx/internal/schedulers/CachedThreadScheduler.java	91.26% <0%> (+1.94%)	6% <0%> (ø)	⬇️
...rx/internal/operators/OnSubscribeFromIterable.java	93.9% <0%> (+2.43%)	5% <0%> (ø)	⬇️
... and 2 more

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