No longer changes the mode of the pem file to not be world readable
No longer changes the mode of the pem file to not be world readable

If it is not world readable it cannot be sent to the new vms and be
read.  We assume bosh will set the proper permissions when using the
file.

[#95665146](https://www.pivotaltracker.com/story/show/95665146)
Signed-off-by: Xing Zhou <6c5835622c7cc802c5cbe159a74efdf961eab2f5@cn.ibm.com>

wcamarao/bosh-openstack-cpi-release,wcamarao/bosh-openstack-cpi-release,wcamarao/bosh-openstack-cpi-release,loewenstein/bosh-openstack-cpi-release,allomov/bosh-openstack-cpi-release,dkoper/bosh-openstack-cpi-release,cloudfoundry-incubator/bosh-openstack-cpi-release,cloudfoundry-incubator/bosh-openstack-cpi-release,dkoper/bosh-openstack-cpi-release,loewenstein/bosh-openstack-cpi-release,dkoper/bosh-openstack-cpi-release,loewenstein/bosh-openstack-cpi-release,allomov/bosh-openstack-cpi-release,cloudfoundry-incubator/bosh-openstack-cpi-release,voelzmo/bosh-openstack-cpi-release,voelzmo/bosh-openstack-cpi-release,allomov/bosh-openstack-cpi-release,voelzmo/bosh-openstack-cpi-release