DB password exposed in the log when db connect failed.

[aqan213]

When failed to connect db, the db password will be exposed in the log file, it's a secure issue.
Error logs:

2019/12/03 07:37:39 failed-to-connection-to-database, dburl:postgres://xxx:xxx@autoscalerpostgres.service.cf.internal:5432/autoscaler?sslmode=verify-full&sslrootcert=/var/vcap/jobs/scalingengine/config/certs/scalingengine_db/ca.crt,  err:pq: password authentication failed for user "xxx"
failed to connect to database:

Checking the code and found the below line will print the DB url with password:

app-autoscaler-release/src/changeloglockcleaner/sqldb/changelogdb.go

Line 28 in 37f28f8

log.Printf("failed-to-connection-to-database, dburl:%s, err:%s\n", dbUrl, err)

[aqan213]

The pull request was merged. Close it.