Update rs_statcounters after downgrading Replication Server version 15.0.1 to version 15.0

[CR #454524] The RSSD database table rs_statcounters is not properly updated when downgrading Replication Server 15.0.1 to version 15.0.

Workaround: Update rs_statcounters. After downgrading to version 15.0, execute rs_1501_rssd_downgrade.sql in the RSSD database. You can get rs_1501_rssd_downgrade.sql from CodeXchange on Sybase Developer Network. The file is in the RepServer project, under Administration Tools/Scripts.