Patch 20485724 throws error "The user is root. OPatch cannot continue if the user is root."

Patch 20485724 with OPatch 12.1.0.1.7 on RHEL 6.6 throws error "The user is root. OPatch cannot continue if the user is root." 

The readme clearly states this patch must be installed as root.  Attempting to install this patch as grid fails.

Here's the process I followed:

1. As user grid I installed Oracle Grid Infrastructure 12.1.0.2.0.

2. As user root ran the root scripts successfully.

3. As user grid I created the OCM Response File as /home/grid/ocm.rsp

4. As user grid installed OPatch 12.1.0.1.7.  Verified using "opatch lsinventory -detail -oh $ORACLE_HOME".

5. As user grid I downloaded patch  20485724 to /home/grid/Downloads and then unzipped it to /home/grid/foo (because the readme suggests an empty folder must be used).