Hi,
I managed to resolve this by KB VMware KB: VMware vCenter Server Appliance 5.5 root account locked out after password expiration untill step 10 to get the bash shell.
Once the Bash shell appeared after the reboot, I was able to follow the steps listed in this forum vCenter Appliance fsck failed and was able to boot into vCenter 6 Appliance successfully.
Cheers!