Properly named variable inside block

Closes #9824.
Removed unnecessary block
Merge pull request #9833 from choudhuryanupam/fix_active_schema_test

Removed unnecessary block
Revert "default the reaping frequency to 10 seconds"

mysql can't handle a parallel thread pinging the connection, so we can
get wrong results or segvs

This reverts commit 7cc588b684f6d1af3e7fab1edfa6715e269e41a2.
use `connect_poll` on pg so that reaping does not hurt the connection