The root user can issue the umount syscall and does not need the
fusermount binary. Therefore, it is not necessary to fork and exec a new
process just to run the umount binary.

Golang has a global lock held for forking (See exec_unix.go in the golang
source tree):
"Acquire the fork lock so that no other threads create new fds that are
not yet close-on-exec before we fork."

So it would be best if processes would refrain from forking
unnecessarily.
Signed-off-by: Shayan Pooya <shayan@arista.com>