Added python-neutronclient for centos-icehouse in R1.10, it was so far using stock python-neutronclient package.
changs in Makefile and pacakging files. Added new spec file for python-neutronclient-icehouse and use appropriate spec file
depending on sku type in third-party/Makefile. Havana also builds fine with these changes.

Change-Id: Iccb923b78ba6613fe837bd01bf30eebf0e110b4a