Reinstate tags-as-metadata adding option to merge tags. Fixes #699 #775
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Picking up the work from #700
I've brought back the missing constructor as mentioned in the review comments of PR 700. Additionally I've added support to start reading isSecure from tags when enabled - for full backwards compatibility.
I did not address the comments around ConfigServer - I see this PR as a compatibility bridge for services already deployed with older versions of Spring Boot, I see current scope of changes sufficient to achieve this goal?
Please be gentle, my first contribution to Spring.