Gh 2839 track creation date of sub graphs

[wb36499]

• Adds /config/graphCreatedTime endpoint to retrieve graph creation timestamp associated with REST API
• Adds operation to retrieve list of all graphIds & associated creation timestamps. In a federated store this will return all sub-graph ids and creations times
• Adds custom property to Accumulostore on table creation to save graph creation time
• Saves MapStore based graph creation times as Store variable on build

Related issue

• Resolve Track creation date of sub graphs #2839

[codecov]

Codecov Report

Attention: Patch coverage is 93.93939% with 2 lines in your changes missing coverage. Please review.

Project coverage is 67.55%. Comparing base (4e15ae1) to head (bc5bdcc).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
...gaffer/operation/impl/get/GetGraphCreatedTime.java	90.00%	1 Missing ⚠️
...fer/operation/serialisation/TypeReferenceImpl.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #3269   +/-   ##
==========================================
  Coverage      67.55%   67.55%           
- Complexity      2591     2595    +4     
==========================================
  Files            927      929    +2     
  Lines          29791    29824   +33     
  Branches        3289     3291    +2     
==========================================
+ Hits           20124    20149   +25     
- Misses          8219     8225    +6     
- Partials        1448     1450    +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud