kubelet cannot start (wrong number of fields) if fstab contains a space character for source

/proc/mounts contains the extra space character making the List call to see 7 fields instead of 6.

OpenShift 4.10 > 4.11 upgrade

All the time in nodes that mounts a filesystem through fstab definition with a space in source

1. Define a source location with a space in fstab in the node 
2. Upgrade OCP (a restart of kubelet might also trigger this issue) 

kubelet won't start with a message similar to:

"Failed to start ContainerManager" err="system validation failed - wrong number of fields (expected 6, got 7)"

MachineConfigPool won't progress with upgrades on nodes.

kubelet service able to start and upgrade process to complete

Seems to be a regression since this behavior wasn't seen in 4.10 version.

Workaround: umount the fileshare from the node while upgrade happens, mount it afterwards.