Format test summary as a table

[cmcmone]

The current summary is to print one block information for each test. If there are many test cases, it is unfriendly to show the result for the user. It may be more convenient to print the results as a table. For example:

test-name	completed	passed	failed
array_test	32	32	0
string_test	68	67	1
Total	100	99	1

[Ndemco]

I like this idea.

One thing to think about: how would we deal with failed tests that print the details of the failure, or when pass report mode is set to detail?

EDIT: It did not dawn on me that the summary is printed after details would be printed, so this is a non-issue.

[cmcmone]

I assigned this issue to myself, I think I can create a dev branch to solve it, what do @smurthys @Ndemco think?

[smurthys]

I recommend not assigning an issue until it has a milestone. Of course, don't work on an issue not (self) assigned to you