Refactoring of the queue drivers tests structure

[LeonidVas]

Now:
Many tests of queue drivers have duplicated code
Wish:
Have some common tests for drivers (remove duplicate code)

Add full testing of a driver API for limfifottl

[LeonidVas]

The test case should be either referenced from a certail test file (like 020-fifottl.t) or it should be obvious from names that certain part of cases is in a separate file (say, ddd-driver_api.t).
#106 (comment)

[rybakit]

Have some common tests for drivers (remove duplicate code)

Just a remark, in my library I went a bit further and divided the common tests into non-TTL and TTL-only tests, so I can easily combine them depending on the queue type.

[LeonidVas]

Have some common tests for drivers (remove duplicate code)

Just a remark, in my library I went a bit further and divided the common tests into non-TTL and TTL-only tests, so I can easily combine them depending on the queue type.

I like the way you think