DB Log is missing watchdog table after enabling - Need to catch and ignore exceptions thrown in dblog_watchdog()

Problem/Motivation

It's completely unacceptable to break a page if we fail to log a message. In particular, this cause painful to debug errors during the installation process, as recently reported in #429188: Watchdog table not installed when watchdog module enabled. → .

Proposed resolution

Catch and ignore all exceptions thrown in dblog_watchdog().

Remaining tasks

• Write a patch.
• Implement a generic test that tries to watchdog() in a Unit Test Case (that doesn't have access to the database).

User interface changes

None.

API changes

None.