Fix collection cache lookup failure with enum keys (backport #3693)#3709

fredericDelaporte merged 3 commits into5.5.xnhibernate/nhibernate-core:5.5.xfrom

mergify/bp/5.5.x/pr-3693nhibernate/nhibernate-core:mergify/bp/5.5.x/pr-3693Copy head branch name to clipboard