Rename Router related methods for VMware NSX plugin

This is another step for the renaming/refactoring of
nvplib and related modules. This is about routers.

Partial-implements blueprint: nicira-plugin-renaming

Change-Id: Ic69b2777fa1ae3125b8adf23943360e3fe18e4c2
Rename L2 Switch/Gateway related methods for VMware NSX plugin

Yet another another step for the renaming/refactoring
of nvplib and related modules. This is about l2 switches
and l2 gateways.

Partial-implements blueprint nicira-plugin-renaming

Change-Id: I35c2b20a33ed8f2df4334c335f91472f7b822f8e
Merge "Rename Router related methods for VMware NSX plugin"
Merge "Rename L2 Switch/Gateway related methods for VMware NSX plugin"