Getting the platform headers in the Java library

You need to have easy access to the headers. So far, however, a controller that must invoke the functions to access this information goes into error. It retrieves them with keys that are not the real ones. The bug is caused by [this line] (https://github.com/mia-platform/custom-plugin-java-springboot/blob/master/library/src/main /java/eu/miaplatform/customplugin/springboot/CPController.java#L43)

You have to edit the Custom-plugin-java and customplugin java springboot libraries.

Linked issues:
- https://github.com/mia-platform/custom-plugin-java
- https://github.com/mia-platform/custom-plugin-java-springboot

Start at library/src/main/java/eu/miaplatform/customplugin/springboot/CPController.java line 43, then compare the custom-plugin-java and custom-plugin-java-springboot libraries. Trace how the controller retrieves platform headers and identify the real header keys. Done means the controller can invoke the header-access functions without an error.

Written by the indexing model from the issue text.