Add privileges for sems_prepaid user.

Used for kamailio lcr routing.

db_scripts/diff/11818.down

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+revoke select on provisioning.voip_peer_hosts from sems_prepaid@localhost;
+revoke select on provisioning.voip_peer_groups from sems_prepaid@localhost;

db_scripts/diff/11818.up

@@ -0,0 +1,2 @@
+grant select on provisioning.voip_peer_hosts to sems_prepaid@localhost;
+grant select on provisioning.voip_peer_groups to sems_prepaid@localhost;