[PUSHED_OBVIOUS] Fix test breakages caused by removal of gdb_py_test_multiple.

[Philippe Waroquiers]

On Tue, 2020-06-30 at 14:34 -0300, Luis Machado wrote:
> > -    gdb_py_test_multiple "Sub-class a breakpoint" \
> > +    gdb_test_multiline "Sub-class a breakpoint" \
> 
> While fixing things up, it would've been nice to fixup the test names 
> not following the rules (starting with lower case, for example).
Thanks for the comment.  I did not (consciously) know
the "start with lower case" rule (this asap fix was
done using automatic replace).
I will now consciously remember the rule :).

I guess the ideal would be to have gdb_test and similar checking
this rule (like what was done to automate the "no duplicate test name"
rule).

Thanks
Philippe