Use hash instead of which in oscap-vm
Use hash instead of which in oscap-vm

Same as parent commit. This also gets rid of ShellCheck warnings in
oscap-vm. Resolves:

/usr/bin/oscap-vm:97:27: error: Can't use > in [ ]. Escape it or use [[..]]. [SC2073]
/usr/bin/oscap-vm:97:6: warning: Quote this to prevent word splitting. [SC2046]
/usr/bin/oscap-vm:99:27: error: Can't use > in [ ]. Escape it or use [[..]]. [SC2073]
/usr/bin/oscap-vm:99:8: warning: Quote this to prevent word splitting. [SC2046]

redhatrises/openscap,mpreisler/openscap,OpenSCAP/openscap,redhatrises/openscap,jan-cerny/openscap,jan-cerny/openscap,redhatrises/openscap,jan-cerny/openscap,Hexadorsimal/openscap,OpenSCAP/openscap,OpenSCAP/openscap,mpreisler/openscap,jan-cerny/openscap,redhatrises/openscap,mpreisler/openscap,mpreisler/openscap,OpenSCAP/openscap,OpenSCAP/openscap,Hexadorsimal/openscap,Hexadorsimal/openscap,mpreisler/openscap,redhatrises/openscap,jan-cerny/openscap,mpreisler/openscap,redhatrises/openscap,Hexadorsimal/openscap,Hexadorsimal/openscap,jan-cerny/openscap,OpenSCAP/openscap,Hexadorsimal/openscap