Add MySQL indexes to the creation script

[germanescobar]

alter table CONNECTIONS_MSGS add index DEST_SEQNUM_IDX (destination, smsc_sequencenumber)
alter table CONNECTIONS_MSGS add index DEST_MSGID_IDX (destination, smsc_messageid)
alter table CONNECTIONS_MSGS add index TO_IDX (smsc_to)
alter table CONNECTIONS_MSGS add index STATUS_IDX (status)

alter table APPLICATIONS_MSGS add index DEST_SEQNUM_IDX (destination, smsc_sequencenumber)
alter table APPLICATIONS_MSGS add index DEST_MSGID_IDX (destination, smsc_messageid)

And also an index to creation_time