TT#65101 add billing.admins is_ccare

* is_ccare flags a user as customer care one
      and is used in ngcp-panel to restrict the role
      only to Customer/Subsceriber related scopes

Change-Id: I72ff7d2d3ba6e56306e1a326f26475cee28e8100

db_scripts/diff/15556.down

@@ -0,0 +1,3 @@
+USE billing;
+
+ALTER TABLE admins DROP COLUMN is_ccare;

db_scripts/diff/15556.up

@@ -0,0 +1,4 @@
+USE billing;
+
+ALTER TABLE admins
+    ADD COLUMN is_ccare tinyint(1) NOT NULL DEFAULT 0 AFTER is_superuser;