neighbor vty: drop keyword 'add'

When writing the neighbor configuration documentation, I noticed that 'neighbor
add' and 'neighbor del' make sense from an interactive VTY POV, but when
looking at a static config file, it makes more sense to simply name the
neighbors without the 'add' keyword, and to use the 'no' prefix instead of the
'del' keyword. It still makes sense to tweak cosmetics like this before
inter-bsc handover is used anywhere.

First, remove 'add' from all 'neighbor add ...' commands.

Instead, prepend "Add" to the doc string for the cell identification argument
in commands that add a neighbor:

  -OsmoBSC(config-net-bts)# neighbor add ?
  -  bts     Neighbor cell by local BTS number
  +OsmoBSC(config-net-bts)# neighbor ?
  +  bts     Add Neighbor cell by local BTS number

(A subsequent patch will rename 'neighbor del' to 'no neighbor'.)

Change-Id: I143f21f6069d1a86096cc8240cf69eb7ea9c8ac8
2 files changed