MT#57110 New cdr aggregated field r_user

Add r_user field for cdrs, this field will store the user part
of the Request Uri answering the first invite with 200 OK.

Change-Id: Idfc666ad108aea9791d3eae473959c382b7f9caa

db_scripts/diff/15762.down

@@ -0,0 +1,4 @@
+USE accounting;
+SET autocommit=0;
+DELETE FROM cdr_tag WHERE type IN ('r_user');
+COMMIT;

db_scripts/diff/15762.up

@@ -0,0 +1,4 @@
+USE accounting;
+SET autocommit=0;
+INSERT INTO cdr_tag (type) VALUES ('r_user');
+COMMIT;