[MAGETWO-45056] Scheduled Import: error log file has incorrect location and content on server

[piotrekkaminski]

Preconditions

1. Put import file with some error (to provoke import error) in the directory for scheduled import.

Steps to reproduce

1. Create Schedules Import for Entity type = Products: MAGETWO-15533
2. In Scheduled Import Grid select Action = "Run" for the import
3. After you got an error "We can't run the operation right now, see error log for details.", go to magento_root/var/log/importexport. Open created error file

Expected result

1. File contains error log

Actual result

1. File contains only some path
2. Following the path - the file is Error log but shows imported file w/o any error logs