RoutingTrie can now handle a trailing slash correctly

[hyangtack]

Motivation:

• DefaultPathMapping now generates the correct regex pattern for a path… #1735 made DefaultPathMapping generate a correct path pattern with a trailing slash,
  but the RoutingTrie hasn't still handled the trailing slash correctly.

Modifications:

• Made RoutingTrie handle the trailing slash correctly.

Result:

• A service can be correctly mapped to the path with a trailing slash.

[codecov]

Codecov Report

Merging #1741 into master will increase coverage by <.01%.
The diff coverage is 75%.

@@             Coverage Diff              @@
##             master    #1741      +/-   ##
============================================
+ Coverage     72.93%   72.94%   +<.01%     
  Complexity     8153     8153              
============================================
  Files           736      736              
  Lines         32465    32468       +3     
  Branches       3989     3991       +2     
============================================
+ Hits          23678    23683       +5     
+ Misses         6757     6756       -1     
+ Partials       2030     2029       -1

Impacted Files	Coverage Δ	Complexity Δ
.../java/com/linecorp/armeria/server/RoutingTrie.java	93.65% <75%> (+0.1%)	22 <0> (+1)	⬆️
...com/linecorp/armeria/internal/grpc/GrpcStatus.java	64.7% <0%> (-2.95%)	24% <0%> (-1%)
...om/linecorp/armeria/client/HttpSessionHandler.java	59.48% <0%> (-1.73%)	28% <0%> (-1%)
...com/linecorp/armeria/server/HttpServerHandler.java	79.35% <0%> (-0.65%)	79% <0%> (-1%)
...common/stream/AbstractStreamMessageDuplicator.java	74.16% <0%> (+0.47%)	9% <0%> (ø)	⬇️
...a/common/grpc/protocol/ArmeriaMessageDeframer.java	72.24% <0%> (+0.47%)	49% <0%> (+1%)	⬆️
...rp/armeria/common/stream/DefaultStreamMessage.java	90.71% <0%> (+1.42%)	54% <0%> (+1%)	⬆️
.../main/java/com/linecorp/armeria/server/Server.java	81.28% <0%> (+1.47%)	16% <0%> (ø)	⬇️

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[trustin]

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