Add lock documentation for job queue and ganeti-noded
Add lock documentation for job queue and ganeti-noded

Also change title formatting to match client-api.txt.

Reviewed-by: iustinp


bitemyapp/ganeti,grnet/snf-ganeti,yiannist/ganeti,apyrgio/ganeti,leshchevds/ganeti,mbakke/ganeti,yiannist/ganeti,dimara/ganeti,ganeti/ganeti,leshchevds/ganeti,onponomarev/ganeti,ganeti/ganeti,mbakke/ganeti,apyrgio/ganeti,leshchevds/ganeti,mbakke/ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,apyrgio/snf-ganeti,andir/ganeti,andir/ganeti,grnet/snf-ganeti,ganeti-github-testing/ganeti-test-1,onponomarev/ganeti,bitemyapp/ganeti,apyrgio/snf-ganeti,andir/ganeti,dimara/ganeti,yiannist/ganeti