CIF-1654 - CIF React Core Components should support GraphQL GET requests

[herzog31]

Description

• Added dependency to GraphQL client 1.7.0 which exports the complete GraphQL client configuration.
  • Also updated MagentoGraphqlClient to expose the client configuration.
• StoreConfigExporterImpl now read the GraphQL client configuration to export the configured HTTP method for GraphQL requests.
  • Update page component HTL to expose the HTTP method in the body tag.
  • Also added an IT for this.
• Added graphqlMethod as new attribute to ConfigContext (also see Venia PR).
• Updated ApolloClient to respect the configured HTTP method.
  • Implemented query compression in the compressQueryFetch method. This is required because of limits of the Magento Cloud CDN. Otherwise for example the getCartDetails query exceeds the allowed URL length and is blocked.
• Updated unit tests.

The integration test setup, that uses the CIF add-on will fail until a new add-on release which includes GraphQL client 1.7.0

Also see adobe/aem-cif-guides-venia#80.

How Has This Been Tested?

• Tested with Venia
• Unit and ITs

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes and the overall coverage did not decrease.
• All unit tests pass on CircleCi.
• I ran all tests locally and they pass.

[codecov]

Codecov Report

Merging #426 into master will increase coverage by 0.04%.
The diff coverage is 92.85%.

@@             Coverage Diff              @@
##             master     #426      +/-   ##
============================================
+ Coverage     85.18%   85.23%   +0.04%     
- Complexity     1058     1061       +3     
============================================
  Files           219      220       +1     
  Lines          5421     5445      +24     
  Branches        780      785       +5     
============================================
+ Hits           4618     4641      +23     
- Misses          651      652       +1     
  Partials        152      152              

Flag	Coverage Δ	Complexity Δ
integration	67.17% <85.71%> (+0.04%)	768.00 <2.00> (+2.00)
jest	79.85% <88.23%> (+0.11%)	0.00 <0.00> (ø)
karma	93.65% <100.00%> (+0.01%)	0.00 <0.00> (ø)
unittests	85.82% <100.00%> (+0.03%)	1022.00 <2.00> (+3.00)

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Impacted Files	Coverage Δ	Complexity Δ
react-components/src/components/App/app.js	20.00% <0.00%> (ø)	0.00 <0.00> (ø)
react-components/src/context/ConfigContext.js	100.00% <ø> (ø)	0.00 <0.00> (ø)
react-components/src/utils/compressQueryFetch.js	93.75% <93.75%> (ø)	0.00 <0.00> (?)
...e/core/components/client/MagentoGraphqlClient.java	71.01% <100.00%> (+0.42%)	13.00 <1.00> (+1.00)
...1/storeconfigexporter/StoreConfigExporterImpl.java	100.00% <100.00%> (ø)	7.00 <1.00> (+2.00)
...ore/cif/clientlibs/common/js/CommerceGraphqlApi.js	82.97% <100.00%> (+0.37%)	0.00 <0.00> (ø)

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