fix usage of -p option of mysql; there may be no space between the -p and the password

What does this MR do?

This fixes the script for checking for stalled jobs. See e.g. https://unix.stackexchange.com/questions/205180/how-to-pass-password-to-mysql-command-line. This was tested on the production server.

Changes to public APIs

Author's checklist (required)

• Intermediate commits compile (use git rebase -i main if not)
• Newly added code has a style consistent with the rest of the repository
• Newly added code is documented (guidelines)

Related issues