remove db48,db63,db75,db76,db77

db48 - RT #7321
db63 - RT #7320
db75 - not in config or monitoring
db76 - not in config or monitoring
db77 - RT #7332

switch s1-secondary from db63 to db60

Change-Id: Ie1b9b9725504f7a1f630b1b7f68e0adcf8cbd58c