umask test also needs to use different octal syntax
umask test also needs to use different octal syntax

 Related to #1414

foosel/OctoPrint,bicephale/OctoPrint,Salandora/OctoPrint,MoonshineSG/OctoPrint,Salandora/OctoPrint,MoonshineSG/OctoPrint,foosel/OctoPrint,bicephale/OctoPrint,beeverycreative/BEEweb,senttech/OctoPrint,foosel/OctoPrint,Salandora/OctoPrint,shohei/Octoprint,MoonshineSG/OctoPrint,Salandora/OctoPrint,foosel/OctoPrint,beeverycreative/BEEweb,JackGavin13/octoprint-test-not-finished,Jaesin/OctoPrint,beeverycreative/BEEweb,shohei/Octoprint,senttech/OctoPrint,senttech/OctoPrint,JackGavin13/octoprint-test-not-finished,beeverycreative/BEEweb,JackGavin13/octoprint-test-not-finished,shohei/Octoprint,JackGavin13/octoprint-test-not-finished,Jaesin/OctoPrint,Jaesin/OctoPrint,shohei/Octoprint,shohei/Octoprint,Jaesin/OctoPrint,senttech/OctoPrint,bicephale/OctoPrint,MoonshineSG/OctoPrint,bicephale/OctoPrint