Fix RETRY - 1 issue

[benank]

In some cases where retries are applied to an operation, the ending condition (used to log an error or throw an exception) is never reached because python ranges are exclusive of the ending bound. This PR fixes this issue and adds a -1 to the conditions so that the previously unreachable code is now used.

[kjohn-msft]

Please ensure all unit tests are run in both core and ext, and pass as expected.

[codecov]

Codecov Report

Merging #118 (fb91a05) into master (adc2192) will increase coverage by 0.51%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #118      +/-   ##
==========================================
+ Coverage   79.79%   80.30%   +0.51%     
==========================================
  Files          86       86              
  Lines       11549    11610      +61     
==========================================
+ Hits         9215     9323     +108     
+ Misses       2334     2287      -47     

Impacted Files	Coverage Δ
src/core/src/bootstrap/EnvLayer.py	70.82% <100.00%> (+4.50%)	⬆️
src/core/src/core_logic/PatchAssessor.py	98.36% <100.00%> (+9.83%)	⬆️
...rc/core/src/service_interfaces/LifecycleManager.py	72.64% <100.00%> (+5.12%)	⬆️
src/core/src/service_interfaces/StatusHandler.py	89.23% <100.00%> (+1.31%)	⬆️
src/core/tests/Test_LifecycleManagerArc.py	94.59% <100.00%> (ø)
src/core/tests/Test_LifecycleManagerAzure.py	94.79% <100.00%> (+0.47%)	⬆️
src/core/tests/Test_PatchAssessor.py	96.87% <100.00%> (ø)
src/core/tests/Test_StatusHandler.py	99.62% <100.00%> (+0.03%)	⬆️
src/core/tests/Test_ZypperPackageManager.py	96.04% <100.00%> (+0.16%)	⬆️
src/extension/src/EnvLayer.py	59.37% <100.00%> (+5.00%)	⬆️
... and 8 more

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