`global.customCertificates` should support bundles

[qaoru]

Hi,

Currently the key global.customCertificates expects one secret containing one or more CA, with one certificate per key.
However, people might manage trust CA bundles as one unique key containing all certificates (i.e. with trust-manager), which is not working as expected on artifactory side : a truststore entry is added but from the whole bundle, so certificates are not trusted.

Maybe an extra checking step on the initcontainer would be sufficient ?