Fix a bug where query params disappear when WebClient executes

[ildartuykin]

Bugfix- disappearing query params, during webclient request execution with undefined endpoint, right CLA commit email

[ikhoon]

Thanks @ildartuykin ! 👍

[trustin]

Thanks a lot, @ildartuykin !

[codecov]

Codecov Report

Merging #2309 into master will decrease coverage by 0.02%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #2309      +/-   ##
============================================
- Coverage     73.67%   73.65%   -0.03%     
+ Complexity    10168    10162       -6     
============================================
  Files           882      882              
  Lines         38863    38866       +3     
  Branches       4812     4813       +1     
============================================
- Hits          28632    28625       -7     
- Misses         7776     7787      +11     
+ Partials       2455     2454       -1

Impacted Files	Coverage Δ	Complexity Δ
.../com/linecorp/armeria/client/DefaultWebClient.java	73.8% <100%> (+2.01%)	13 <0> (+1)	⬆️
...com/linecorp/armeria/server/saml/SamlEndpoint.java	62.5% <0%> (-2.5%)	10% <0%> (-1%)
...a/com/linecorp/armeria/client/HttpChannelPool.java	72.76% <0%> (-2.34%)	59% <0%> (-2%)
...inecorp/armeria/server/HttpResponseSubscriber.java	83.96% <0%> (-1.69%)	72% <0%> (-5%)
.../main/java/com/linecorp/armeria/server/Server.java	82.93% <0%> (-1.2%)	28% <0%> (ø)
...armeria/server/healthcheck/HealthCheckService.java	83.51% <0%> (-1.1%)	47% <0%> (-1%)
...inecorp/armeria/server/grpc/ArmeriaServerCall.java	87.1% <0%> (-0.4%)	85% <0%> (-1%)
...p/armeria/common/stream/DeferredStreamMessage.java	87.69% <0%> (+1.53%)	39% <0%> (+1%)	⬆️
...client/endpoint/healthcheck/HttpHealthChecker.java	88.23% <0%> (+2.94%)	19% <0%> (+1%)	⬆️
...meria/common/stream/RegularFixedStreamMessage.java	87.75% <0%> (+6.12%)	14% <0%> (+1%)	⬆️

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[minwoox]

Thank you!

[trustin]

Thanks again, @ildartuykin!