Warn the user if they are creating a subscription to a parameter group of size 1

Warn the user if they are creating a subscription to a parameter group with only a single parameter, as this is unnecessary and introduces extra work and even synchronisation issues

assigned to @pelson

added 4 commits

• a439f7e3...b63742f0 - 3 commits from branch scripting-tools:master
• 4ae6d17d - Warn the user if they are creating a subscription to a parameter group with...

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approved this merge request

enabled an automatic merge when the pipeline for 4ae6d17d succeeds

merged

mentioned in commit 2f62916a