TT#3991 Add ncos level flag for intra-pbx calls

If set and a call is done within a pbx customer, the call is blocked
in blacklist, and is allowed in whitelist.

Change-Id: I3a113a29baa0c1500e23016d05c8225024dcf295
(cherry picked from commit ebd20192e0)

db_scripts/diff/15285.down

@@ -0,0 +1,3 @@
+use billing;
+
+alter table ncos_levels drop column intra_pbx;

db_scripts/diff/15285.up

@@ -0,0 +1,3 @@
+use billing;
+
+alter table ncos_levels add column intra_pbx tinyint(1) not null default 0 after local_ac;