remove hostPath mounts

[ctrought]

In OKD/OpenShift hostPath mounts require additional privileges provided through SecurityContextContraints. We'd like to avoid the use of hostPath mounts so we do not need to grant unnecessary privileges to worklodas, currently they are used to mount localtime from the node. Instead, it would be preferred for us to set a timezone environment variable (if desired) and let the underlying processes use if needed.