fix: call proceedNextContext() in reset() and replace test sleeps with semaphores#1011

mPokornyETM wants to merge 1 commit intomasterjenkinsci/lockable-resources-plugin:masterfrom

fix/988-reset-race-and-test-sleepsjenkinsci/lockable-resources-plugin:fix/988-reset-race-and-test-sleepsCopy head branch name to clipboard