Several minor changes

 * Base image name and keypair name were added to cluster details
 * In Node Group Details renamed fields: 'Node Group' to 'Name', 'Nodes Count'
   to 'Number of Nodes', 'Node Group Template' to 'Template'.
 * In cluster details instances now have http links

Change-Id: Ie582228c4956145a222f7021658c538ca1c7b80a
Merge "Several minor changes"