Display the vip name in the floating IP association dialog

When LBaaS vips are defined, the floating IP association dialog used to
display them with their IP and the name "None". Now, the name of the vip
is used.

Closes-bug: 1401954
Change-Id: I3e26dc84d0af9f226f1e1fc915c04c4089cf7c93
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Change-Id: I53560ae78b31cd6f1b4b7e5685514dadd663efa6
Merge "Display the vip name in the floating IP association dialog"