This patch adds '--description' option to
os security group rule create cmd.
Change-Id: I604bcdeb4658d2dcc4d860a87e704e186cca5225
Partially-Implements: blueprint network-commands-options
Partially-Implements: blueprint neutron-client-descriptions
Added simple option for floating ip description when creating
a floating ip.
Added option for create and set router as well.
Partially Implements: blueprint neutron-client-descriptions
Partially Implements: blueprint network-commands-options
Change-Id: Ib8cd8af449e9ff33b980017b2527a6b196894a00