Squashed 'appmock/' changes from 7f7c93c26..fa534440d
Squashed 'appmock/' changes from 7f7c93c26..fa534440d

fa534440d VFS-3280 Move healthcheck of tcp_server out of gen_server process (it caused deadlock on ssl:close, as the gen_server needs to handle it).

git-subtree-dir: appmock
git-subtree-split: fa534440dd03948da642675e768c019866bb6743

onedata/helpers,onedata/helpers