Improve help text for cloudpipe
Improve help text for cloudpipe

Previous commit moved cloudpipe options to central location.
This commit adds additional help text to those options.

Blueprint centralize-config-options-newton

Change-Id: I92a03cb1f219d6af071b30cf7d6fed13295da134

phenoxim/nova,rajalokan/nova,cloudbase/nova,Juniper/nova,rahulunair/nova,openstack/nova,openstack/nova,Juniper/nova,sebrandon1/nova,rajalokan/nova,hanlind/nova,sebrandon1/nova,cloudbase/nova,alaski/nova,klmitch/nova,openstack/nova,klmitch/nova,klmitch/nova,mikalstill/nova,vmturbo/nova,rahulunair/nova,Juniper/nova,mahak/nova,rajalokan/nova,hanlind/nova,phenoxim/nova,rajalokan/nova,mahak/nova,Juniper/nova,vmturbo/nova,cloudbase/nova,mikalstill/nova,jianghuaw/nova,hanlind/nova,sebrandon1/nova,jianghuaw/nova,gooddata/openstack-nova,vmturbo/nova,vmturbo/nova,gooddata/openstack-nova,gooddata/openstack-nova,jianghuaw/nova,jianghuaw/nova,rahulunair/nova,mikalstill/nova,gooddata/openstack-nova,alaski/nova,klmitch/nova,mahak/nova