Log a warning in case of missing sts dependency.

[ascheja]

Description

Log a warning message if the sts dependecy is missing and either the necessary properties or the environment variables for web identity are present.

Motivation and Context

When using the a credentials provider chain with the intent to use web identity with a fallback to some other credential method for development the web identity credentials provider will be silently skipped if the sts dependency is missing. Also see #1915.

Testing

---

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• I have read the CONTRIBUTING document
• Local run of mvn install succeeds
• My code follows the code style of this project
• My change requires a change to the Javadoc documentation
• I have updated the Javadoc documentation accordingly
• I have read the README document
• I have added tests to cover my changes
• All new and existing tests passed
• A short description of the change has been added to the CHANGELOG
• My change is to implement 1.11 parity feature and I have updated LaunchChangelog

License

• I confirm that this pull request can be released under the Apache 2 license

[ascheja]

I'm currently having troubles running the unittests locally (even on master), I'll have to take a look at it on the weekend.

[dagnir]

I'm currently having troubles running the unittests locally (even on master), I'll have to take a look at it on the weekend.

Should be fine, our CodeBuild job should suffice for this.

[codecov-io]

Codecov Report

Merging #2169 (807677c) into master (1d6a766) will increase coverage by 0.01%.
The diff coverage is 25.00%.

@@             Coverage Diff              @@
##             master    #2169      +/-   ##
============================================
+ Coverage     77.44%   77.45%   +0.01%     
  Complexity      328      328              
============================================
  Files          1222     1222              
  Lines         38301    38304       +3     
  Branches       3018     3018              
============================================
+ Hits          29661    29669       +8     
+ Misses         7184     7181       -3     
+ Partials       1456     1454       -2     

Flag	Coverage Δ	Complexity Δ
unittests	77.45% <25.00%> (+0.01%)	0.00 <0.00> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ	Complexity Δ
...dentials/internal/WebIdentityCredentialsUtils.java	33.33% <25.00%> (ø)	0.00 <0.00> (ø)
...ssdk/core/internal/async/FileAsyncRequestBody.java	84.76% <0.00%> (+3.80%)	0.00% <0.00%> (ø%)
...nio/netty/internal/OldConnectionReaperHandler.java	90.90% <0.00%> (+9.09%)	0.00% <0.00%> (ø%)

---

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 1d6a766...807677c. Read the comment docs.