MT#16777 Add prefix and number key to lnp tbl

- The LNP provider table needs to have a routing prefix
- The LNP number table needs to have a key on the number col

Change-Id: Ida7741f2806043bf55178fe9402ee4675cc539c4

db_scripts/diff/15208.up

@@ -0,0 +1,4 @@
+USE billing;
+
+ALTER TABLE lnp_providers ADD COLUMN prefix VARCHAR(32) NOT NULL DEFAULT '';
+ALTER TABLE lnp_numbers ADD KEY number_idx(number);