Add retry handler to authentication providers

[patrikhellgren]

Q	A
Bug fix?	no
New feature?	yes
New sample?	no
Related issues?

What's in this Pull Request?

Added Msal Http Client Factory with retry handler to authentication providers.

[codecov-commenter]

Codecov Report

Merging #656 (b7b24f2) into dev (c13436b) will increase coverage by 7.12%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev     #656      +/-   ##
==========================================
+ Coverage   75.32%   82.45%   +7.12%     
==========================================
  Files         257      414     +157     
  Lines       19708    28536    +8828     
==========================================
+ Hits        14846    23529    +8683     
- Misses       4862     5007     +145     

Impacted Files	Coverage Δ
...del/SharePoint/Core/Internal/FieldLocationValue.cs	0.00% <0.00%> (-35.49%)	⬇️
...ore.Auth/Utilities/ApplicationBuilderExtensions.cs	62.06% <0.00%> (-26.17%)	⬇️
...h/Public/UsernamePasswordAuthenticationProvider.cs	68.60% <0.00%> (-25.52%)	⬇️
...P.Core/QueryModel/Query/BaseDataModelExtensions.cs	38.88% <0.00%> (-23.07%)	⬇️
...k/PnP.Core/Model/Teams/Internal/TeamIdentitySet.cs	50.00% <0.00%> (-16.67%)	⬇️
src/sdk/PnP.Core/Utilities/StringExtensions.cs	85.07% <0.00%> (-14.93%)	⬇️
.../Model/Teams/Internal/TeamChatMessageAttachment.cs	85.71% <0.00%> (-14.29%)	⬇️
...nP.Core/Services/Core/Http/SharePointRestClient.cs	70.37% <0.00%> (-12.24%)	⬇️
...e/Model/SharePoint/Core/Internal/StorageMetrics.cs	77.77% <0.00%> (-9.73%)	⬇️
.../PnP.Core/QueryModel/Query/ExpressionExtensions.cs	91.30% <0.00%> (-8.70%)	⬇️
... and 286 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1501583...b7b24f2. Read the comment docs.