Use https redirects for cygwin-installer and oc origin cli

All external downloads should use https redirects if possible
RHDENG-744:
1. https://developers.redhat.com/redirect/to/oc-origin-cli-1.2.0.download => https://github.com/openshift/origin/releases/download/v1.2.0/openshift-origin-client-tools-v1.2.0-2e62fab-windows.zip
2. https://developers.redhat.com/redirect/to/cygwin-installer-2.5.2.download => https://cygwin.com/setup-x86_64.exe