Auto create container flag

[kushagraThapar]

• Added auto create collection field in @document annotation: Config flag to enable/disable autocreate Containers(Cosmos SQL API) if not exists #454

[codecov-io]

Codecov Report

Merging #462 into v2.1.x will decrease coverage by 0.05%.
The diff coverage is 72.72%.

@@            Coverage Diff             @@
##           v2.1.x     #462      +/-   ##
==========================================
- Coverage   75.34%   75.29%   -0.06%     
==========================================
  Files          48       48              
  Lines        1456     1465       +9     
  Branches      163      166       +3     
==========================================
+ Hits         1097     1103       +6     
- Misses        270      271       +1     
- Partials       89       91       +2

Impacted Files	Coverage Δ
...epository/support/DocumentDbEntityInformation.java	88.46% <100%> (+0.83%)	⬆️
...repository/support/SimpleDocumentDbRepository.java	87.3% <25%> (-4.51%)	⬇️

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