Make possible to configure retry options for Consul discovery client

[gcotelli]

ConsulAgentHttpAPIBasedDiscoveryClient

Fixes #46

[codecov]

Codecov Report

Merging #51 (b02e031) into release-candidate (1740576) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@                Coverage Diff                 @@
##           release-candidate      #51   +/-   ##
==================================================
  Coverage              99.62%   99.63%           
==================================================
  Files                     53       53           
  Lines                   2960     2992   +32     
==================================================
+ Hits                    2949     2981   +32     
  Misses                    11       11           

Impacted Files	Coverage Δ
...mples/SuperluminalServiceDiscoveryExample.class.st	100.00% <100.00%> (ø)
...ry/ConsulAgentHttpAPIBasedDiscoveryClient.class.st	100.00% <100.00%> (ø)

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