Clean up image-show
Clean up image-show

- parse server entity to just an id
- parse metadata out into separate rows

Change-Id: I8927b148714a7f5ed64bbb74bd79193e258cb34d

metacloud/python-novaclient,akash1808/python-novaclient,mat128/python-novaclient,takeshineshiro/python-novaclient,mat128/python-novaclient,JioCloud/python-novaclient,metacloud/python-novaclient,CCI-MOC/python-novaclient,guptaankita/python-novaclient,guptaankita/python-novaclient,CCI-MOC/python-novaclient,JioCloud/python-novaclient,ntt-sic/python-novaclient,takeshineshiro/python-novaclient,akash1808/python-novaclient,citrix-openstack-build/python-novaclient,ntt-sic/python-novaclient,Shihta/python-novaclient,citrix-openstack-build/python-novaclient,Shihta/python-novaclient