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    Type:Task 
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    Resolution: Done
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    Priority:L3 - Default 
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    Affects Version/s: None
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    Component/s: backend, documentation
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    None
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        Not defined
Context:
As Camunda 7.15 gets released at the end of quarter 1 Optimize needs to officially support this new minor release while 7.12 support will be dropped
AT:
- Camunda Platform test version is raised to 7.15
	- 7.15 is added to supported versions in the engine version checker
 
- Camunda Platform model version is raised to 7.15
- engine integration tests are extended with a 7.15 stage
- Supported Environment in docs are updated accordingly
- drop of support for 7.12 support
- removal of 7.12 engine integration test stage
- drop of support for 7.12 is listed in the update notes to 3.4.0