Refs #6795, add --iis-map-field option to allow users of log importer script to parse log files created using the IIS Advanced Logging module. Includes tests for such a case (including python unit test + PHP System test).

refs #5940 put tests in correct folders, better testsuite names, some tests still fail and I cannot figure out why

User ID is NULLable now results in expected tests results: nb_users = 0 when no user id was set. refs #3490 #6162

Refs #3632 New test case: replaying logs and forcing a window look back (forceLargeWindowLookBackForVisitor=1)
=> The visitor is now marked as "returning" as expected

Refs #3632 Creating a test case: same visitor (same IP + idvisitor) visits the website on two different days.
Visitors on second day is marked as "new" because window_look_back_for_visitor is not set.

Forcing all recorders and recorders max payload to 1, to prevent random behavior (eg. in Live.getLastVisitsDetails, the pageIdAction may be random order if recorders import data in random thread order)

Fixes #4628 --enable-bots now works as expected + our importLogs integration test shows that this wasn't working before.

 * making some tests pass == fixing bugs