Flavor-list sort by ID numerically
Flavor-list sort by ID numerically

Fixes bug 1016680 - the flavors list created has
ID field value as a unicode string therefore sort
on it not the same as numerical.

Change-Id: I71f2c8583cca33d2f1be2a2daa856ecec524267e

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