TT#11003 Depend on lsb-base for init script's lsb functions

Fixes lintian issue:

| E: ngcp-panel: init.d-script-needs-depends-on-lsb-base etc/init.d/ngcp-panel (line 15)

We don't ship a systemd unit yet, so even when using systemd
(which we don't even support yet, though let's make lintian
happy) the init script is being used.  Then we need to have
lsb-base present since we use its /lib/lsb/init-functions in
ngcp-panel's sysv init script.  JFTR, on sysv systems lsb-base is
present by default, though on systemd-only systems lsb-base
doesn't necessarily need to be present.

Change-Id: I1ee50b952d535548d97c3c03f00cf2c77695c8be

debian/control

@@ -101,10 +101,11 @@ Depends: gettext,
          libuuid-perl,
          libxml-mini-perl,
          libxml-xpath-perl,
+         lsb-base (>= 3.0-6),
          ngcp-schema,
-         sipsak (>= 0.9.6+git20160713),
          nginx-common,
          openssl,
+         sipsak (>= 0.9.6+git20160713),
          sox,
          ${misc:Depends},
          ${perl:Depends}