Summary
Test format binary should accept "-T" instead of "-t" to enable tracing. This will make parameters consistent with "format.sh" 

Motivation

At the moment test format binary(test/format/t.c) accepts:

• "-t trace operations in the WiredTiger log"

and "test/format/format.sh" accepts:

• "-T turn on format tracing (defaults to off)"
• "-t minutes   minutes to run (defaults to no limit)"

This difference is confusing. We need to unify parameters and change to "-T" in test format binary.

Here's a comment from Keith B:
"The format binary in the develop branch uses both -t and -T for tracing, and format.sh uses -T for tracing, and -t for the minutes to run timeout. I didn't look, but it's probably historical: format.sh probably had -t for a timeout from when it was first created, and I hacked in -T later to get tracing.

In the format-mirror branch, I removed -T as an option for format itself at some point, but left -T alone in format.sh, since -t wasn't available.

It would be an easy change to switch format to use -T instead of -t, then they'd be the same."