lisa.wlgen.rta: Refactor rtapp capacities mismatch warning
lisa.wlgen.rta: Refactor rtapp capacities mismatch warning

Split it out in its own method so it can be reused.

credp/lisa,ARM-software/lisa,credp/lisa,credp/lisa,ARM-software/lisa,ARM-software/lisa,credp/lisa,ARM-software/lisa