CVE cache size set to -1 when used in rest-backend

[henrikplate]

Describe the bug
The generic cache class in module shared has a field max_size, which is - depending on the constructor used - initialized with -1. This is the case when the class is used in the scope of the rest-backend, and results in wrong behavior when cache entries are read (too many entries get deleted).

To Reproduce
Steps to reproduce the behavior: The wrong behavior (too many cache deletes) can be observed in the logs of the rest-backend.

Expected behavior
Do not impose a size limit if max_size==-1, use the provided size otherwise.

Vulas version

• 3.x before 3.0.10

[henrikplate]

Fixed with release 3.0.10