Immutables support in DynamoDb Enhanced Client

[bmaizels]

See README.md changes for description of new features. Fulfills #1801

Testing

New tests were written. All tests pass.

License

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

[codecov-commenter]

Codecov Report

Merging #2012 into master will increase coverage by 0.06%.
The diff coverage is 87.29%.

@@             Coverage Diff              @@
##             master    #2012      +/-   ##
============================================
+ Coverage     76.92%   76.98%   +0.06%     
  Complexity      225      225              
============================================
  Files          1107     1119      +12     
  Lines         33507    33966     +459     
  Branches       2573     2624      +51     
============================================
+ Hits          25774    26148     +374     
- Misses         6453     6515      +62     
- Partials       1280     1303      +23     

Flag	Coverage Δ	Complexity Δ
#unittests	76.98% <87.29%> (+0.06%)	225.00 <0.00> (ø)

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

Impacted Files	Coverage Δ	Complexity Δ
...amazon/awssdk/enhanced/dynamodb/TableMetadata.java	100.00% <ø> (ø)	0.00 <0.00> (ø)
...k/enhanced/dynamodb/internal/mapper/StaticKey.java	55.55% <55.55%> (ø)	0.00 <0.00> (?)
...enhanced/dynamodb/internal/mapper/StaticIndex.java	66.66% <66.66%> (ø)	0.00 <0.00> (?)
...enhanced/dynamodb/mapper/ImmutableTableSchema.java	79.64% <79.64%> (ø)	0.00 <0.00> (?)
...dk/enhanced/dynamodb/mapper/StaticTableSchema.java	81.13% <81.81%> (-9.05%)	0.00 <0.00> (ø)
...db/internal/mapper/ResolvedImmutableAttribute.java	87.09% <87.09%> (ø)	0.00 <0.00> (?)
...ed/dynamodb/mapper/StaticImmutableTableSchema.java	88.55% <88.55%> (ø)	0.00 <0.00> (?)
...modb/internal/immutable/ImmutableIntrospector.java	89.47% <89.47%> (ø)	0.00 <0.00> (?)
.../enhanced/dynamodb/mapper/StaticTableMetadata.java	82.00% <92.85%> (+8.92%)	0.00 <0.00> (ø)
...ssdk/enhanced/dynamodb/mapper/StaticAttribute.java	94.11% <95.65%> (-5.89%)	0.00 <0.00> (ø)
... and 25 more

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[cenedhryn]

Also went through Sonarcloud issues, it misinterprets the Optional.ifPresent().

[sonarqubecloud]

SonarCloud Quality Gate failed.

7 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
30 Code Smells

87.6% Coverage
1.1% Duplication

The version of Java (1.8.0_252) you have used to run this analysis is deprecated and we will stop accepting it from October 2020. Please update to at least Java 11.
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