Add KojiClientSession construcor with URL and executor service

[janinko]

No description provided.

[codecov]

Codecov Report

Merging #270 (b089b04) into master (d63eb3c) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #270      +/-   ##
============================================
+ Coverage     69.02%   69.03%   +0.01%     
- Complexity      620      621       +1     
============================================
  Files            38       38              
  Lines          3038     3039       +1     
  Branches        377      377              
============================================
+ Hits           2097     2098       +1     
  Misses          768      768              
  Partials        173      173              

Impacted Files	Coverage Δ	Complexity Δ
...jboss/pnc/build/finder/koji/KojiClientSession.java	60.91% <100.00%> (+0.45%)	17.00 <1.00> (+1.00)

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