Implement Lease creation for Physical reservations

climate lease-create was not available, albeit we need it for the
physical reservation usecase. Adding it, e.g.

climate lease-create --physical-reservation min=1,max=5,\
 hypervisor_properties='["=", "$hypervisor_type", "QEMU"]',\
 resource_properties="" test_phys

Partially implements blueprint python-client

Change-Id: Ia836846c3d25a3dd3ccd3308d40f165253df059d
Merge "Implement Lease creation for Physical reservations"