TT#36828 Replace joe editor package with nano in ngcp-nth-*

nano has better defaults for people not being used to it
than joe, whoever wants to switch the system editor can
run `sudo update-alternatives --config editor`.

Sorry, Victor :)

Change-Id: I8d203ac101ab3a7c5a8bf17848ece4aa9b854dcb

debian/control

@@ -172,13 +172,13 @@ Depends:
  iotop,
  ipcalc,
  irqbalance,
- joe,
  less,
  libtemplate-perl,
  locales-all,
  lsb-release,
  lsof,
  man-db,
+ nano,
  ngcp-bulk-processor,
  ngcp-inventory,
  ngcp-klish-config,
@@ -218,13 +218,13 @@ Depends:
  iotop,
  ipcalc,
  irqbalance,
- joe,
  less,
  libtemplate-perl,
  locales-all,
  lsb-release,
  lsof,
  man-db,
+ nano,
  ngcp-bulk-processor,
  ngcp-klish-config,
  ngrep-sip,