Remove duplicate DB options
Remove duplicate DB options

sql_dbpool_enable and sql_connection_trace are declared twice.

Looks like this was a merge conflict when sql_dbpool_enable changed
from int to bool.

Change-Id: I553c5beea916e0ee296648342324fd53167c073a

JioCloud/oslo-incubator,JioCloud/oslo-incubator,JioCloud/oslo-incubator