Add new --w3c-field-regex option to log importer which allows specifying regex for any w3c extended log field. Can combine this option w/ --regex-group-to-...-cvar options to track any field that the importer doesn't natively recognize.

Replace --api-to-cvar params with --regex-group-to-cvar options in log importer for greater flexibility. Added an --ignore-groups parameter to allow ignoring certain parsed groups (like userid). Also added available regex groups to log-format-regex documentation (not added in generic way unfortunately).

refs #6705 fix integration tests that have changed as a user metric is no longer returned in those examples

Add option to map API tracking parameter to custom variable in log importer script. Includes change to ImportLogs system test and fix for import log custom variable handling (old behavior was to not set multiple custom variables if they were set already instead of simply adding custom variables).

Fixes #6919, do not check for host in regex group in log importer if format has no regex. Also add nginx json log to log importer system test.

fixed some system tests. the order change of some device reports changed as they have sometimes same orderid and as we moved some ecommerce reports it results in a different order now

fix tests as reports are invalidated now in some tests causing the site creation date to change causing archiving more dates

fixed some integration tests. for example sometimes a converted goal was listed before the actual pageview