Fixed issue where specifying a custom presigning time causes a runtime exception.

[millems]

No description provided.

[codecov-io]

Codecov Report

Merging #1310 into master will increase coverage by 0.03%.
The diff coverage is 85.71%.

@@             Coverage Diff              @@
##             master    #1310      +/-   ##
============================================
+ Coverage     70.53%   70.57%   +0.03%     
  Complexity      188      188              
============================================
  Files           776      776              
  Lines         24038    24039       +1     
  Branches       1797     1797              
============================================
+ Hits          16956    16966      +10     
+ Misses         6297     6290       -7     
+ Partials        785      783       -2

Flag	Coverage Δ	Complexity Δ
#unittests	70.57% <85.71%> (+0.03%)	188 <0> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
...wssdk/auth/signer/internal/AbstractAws4Signer.java	88.19% <85.71%> (-0.56%)	0 <0> (ø)
.../http/nio/netty/internal/NettyRequestExecutor.java	70.27% <0%> (+5.4%)	0% <0%> (ø)	⬇️

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