Test renamecreate also when file is rotated to unknown (to pytgail) n…

[arekm]

…ame and pygtail is freshly reading file.

This test is testing a case when:

• logrotate (https://github.com/logrotate/logrotate) rotates file to some unknown file name (in real life scenario it rotates the file to different "archive/" directory
• log file gets new entries
• some new run of script uses pygail to read log file (that's why I'm "reopening" file using new pytgail object)

Currently pygtail is failing this test suite due to bug in pygtail not handling such case.

[bgreenlee]

Merged