RxJavaAssemblyException prints StackTrace in getMessage

[piomar123]

Tested in Eclipse ad IntelliJ:

Proposition for #76

[codecov]

Codecov Report

Merging #77 into 3.x will decrease coverage by 0.05%.
The diff coverage is 80.00%.

@@             Coverage Diff              @@
##                3.x      #77      +/-   ##
============================================
- Coverage     84.01%   83.96%   -0.06%     
  Complexity     2189     2189              
============================================
  Files           388      388              
  Lines         16470    16473       +3     
  Branches       1906     1906              
============================================
- Hits          13837    13831       -6     
- Misses         1994     1998       +4     
- Partials        639      644       +5     

Impacted Files	Coverage Δ	Complexity Δ
...karnokd/rxjava3/debug/RxJavaAssemblyException.java	83.01% <80.00%> (-0.99%)	21.00 <0.00> (ø)
...in/java/hu/akarnokd/rxjava3/joins/ActivePlan7.java	80.00% <0.00%> (-8.00%)	6.00% <0.00%> (-4.00%)
...rnokd/rxjava3/basetypes/BlockingGetSubscriber.java	36.70% <0.00%> (-3.80%)	10.00% <0.00%> (-1.00%)
...u/akarnokd/rxjava3/operators/FlowableCoalesce.java	94.01% <0.00%> (-1.71%)	3.00% <0.00%> (ø%)
...akarnokd/rxjava3/schedulers/ParallelScheduler.java	93.82% <0.00%> (-1.69%)	32.00% <0.00%> (ø%)
...u/akarnokd/rxjava3/schedulers/SharedScheduler.java	85.24% <0.00%> (-1.64%)	7.00% <0.00%> (ø%)
...akarnokd/rxjava3/operators/ObservableMapAsync.java	98.41% <0.00%> (-1.59%)	3.00% <0.00%> (ø%)
...in/java/hu/akarnokd/rxjava3/joins/ActivePlan5.java	84.21% <0.00%> (ø)	6.00% <0.00%> (ø%)
...in/java/hu/akarnokd/rxjava3/joins/ActivePlan8.java	82.14% <0.00%> (ø)	8.00% <0.00%> (ø%)
...okd/rxjava3/operators/ObservableObserveOnDrop.java	100.00% <0.00%> (+1.61%)	3.00% <0.00%> (ø%)
... and 4 more

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[akarnokd]

Thanks.

RxJava 3.0.6 is due the 20th so I'll release this a bit after.