Update add-node.py
Update add-node.py

- RHSM user/password/pool is not prompted for
- added hardcoded key_path due to: 
TASK [ssh-key : OSE ec2 key] ***************************************************
fatal: [localhost]: FAILED! => {"failed": true, "msg": "'key_path' is undefined"}
openshift/openshift-ansible-contrib,Tlacenka/openshift-ansible-contrib,scollier/openshift-ansible-contrib,pschiffe/openshift-ansible-contrib,cwilkers/openshift-ansible-contrib,cwilkers/openshift-ansible-contrib,detiber/openshift-ansible-contrib,cooktheryan/openshift-ansible-contrib,cooktheryan/openshift-ansible-contrib,Tlacenka/openshift-ansible-contrib,scollier/openshift-ansible-contrib,scollier/openshift-ansible-contrib,dav1x/openshift-ansible-contrib,detiber/openshift-ansible-contrib,dav1x/openshift-ansible-contrib,dav1x/openshift-ansible-contrib,openshift/openshift-ansible-contrib,glennswest/openshift-ansible-contrib,detiber/openshift-ansible-contrib,scollier/openshift-ansible-contrib,Tlacenka/openshift-ansible-contrib,dav1x/openshift-ansible-contrib,pschiffe/openshift-ansible-contrib,Tlacenka/openshift-ansible-contrib,openshift/openshift-ansible-contrib,cooktheryan/openshift-ansible-contrib,pschiffe/openshift-ansible-contrib,cwilkers/openshift-ansible-contrib,openshift/openshift-ansible-contrib,detiber/openshift-ansible-contrib,pschiffe/openshift-ansible-contrib,cooktheryan/openshift-ansible-contrib,cwilkers/openshift-ansible-contrib