Fix #219 - Remove generic catch clause

[kbeaugrand]

Description

What's new?

• Fix generic catch clause

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Tests
• Other

[codecov]

Codecov Report

Merging #220 (5a72e15) into main (a4da4b3) will increase coverage by 1.75%.
The diff coverage is 100.00%.

❗ Current head 5a72e15 differs from pull request most recent head a58404a. Consider uploading reports for the commit a58404a to get more accurate results

@@            Coverage Diff            @@
##            main     #220      +/-   ##
=========================================
+ Coverage   8.38%   10.14%   +1.75%     
=========================================
  Files         71       71              
  Lines       2361     2357       -4     
=========================================
+ Hits         198      239      +41     
+ Misses      2163     2118      -45     

Impacted Files	Coverage Δ
...ub.Portal/Server/Controllers/GatewaysController.cs	20.49% <100.00%> (+20.49%)	⬆️
.../AzureIoTHub.Portal/Server/Helpers/DeviceHelper.cs	41.93% <0.00%> (+6.45%)	⬆️
...zureIoTHub.Portal/Shared/Models/GatewayListItem.cs	100.00% <0.00%> (+100.00%)	⬆️

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