fix array path parameter deserialization

[tangiel]

This change fixes path parameter deserialization when the parameter is
an array-like structure. Previously, this only worked for query
parameters, and a string literal was injected as an array for path
parameters.

[codecov-io]

Codecov Report

Merging #137 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #137      +/-   ##
============================================
+ Coverage     79.91%   79.93%   +0.02%     
- Complexity     1668     1670       +2     
============================================
  Files           156      156              
  Lines          5580     5586       +6     
  Branches        719      721       +2     
============================================
+ Hits           4459     4465       +6     
  Misses          843      843              
  Partials        278      278

Impacted Files	Coverage Δ	Complexity Δ
...ver/spi/request/RestServletRequestParamReader.java	93.33% <100%> (+0.74%)	23 <0> (+2)	⬆️

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