Tile Caching: Caching Defaults: Enabling/Disabling the option "direct integration with GeoServer WMS" reflects only after WMS pod restart

[groldan]

Steps to reproduce:

• Try checking the option "Enable direct integration with GeoServer WMS" under Tile Caching, Caching Defaults for the very first time.
• Under Layers select a layer and Check "Create a cached layer for this layer" under Tile Caching tab for the particular layer
• Try to access the layer using the WMS endpoint from the browser
• Check for a folder with the name similar to the layer name under cache directory/persistent volume mount in any of the pod where the cache volume is mounted (It might have not created)
• Try deleting the WMS pod which automatically creates a new pod with the updated configurations.
• Try to access the layer again and now you will notice a new folder gets created and the layers start to cache the tiles.

Possible Reason: The WMS spring microservice loads the configuration when it initially starts and not being refreshed for every configuration changes until it restarts or starts again.

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Originally reported at camptocamp/helm-geoserver-cloud#171