this patch refactors the nsx v3 logical switch port functions
into the rest client/resource model and updates all refs
to these functions to use an nsx v3 client. the patch also
adds support for passing switch profile ids to the lport create.
this functionality will be leveraged in subsequent port
security change sets.
Change-Id: I1cf86a7f3127f637735560f1ad60eb36edac7500
22618a005b