Make sure no lock file deletion race conditions. fix #1644
Make sure no lock file deletion race conditions. fix #1644

JorisDeRieck/Flexget,tobinjt/Flexget,Flexget/Flexget,crawln45/Flexget,malkavi/Flexget,malkavi/Flexget,ianstalk/Flexget,Flexget/Flexget,malkavi/Flexget,gazpachoking/Flexget,JorisDeRieck/Flexget,Flexget/Flexget,tobinjt/Flexget,ianstalk/Flexget,JorisDeRieck/Flexget,Flexget/Flexget,Danfocus/Flexget,malkavi/Flexget,ianstalk/Flexget,Danfocus/Flexget,crawln45/Flexget,gazpachoking/Flexget,crawln45/Flexget,tobinjt/Flexget,crawln45/Flexget,Danfocus/Flexget,Danfocus/Flexget,JorisDeRieck/Flexget,tobinjt/Flexget