Add ability to exclude postfix from log file names with regexp pattern

[NoHow]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 4472460101

• 22 of 36 (61.11%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.7%) to 60.969%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
app/discovery/events.go	19	21	90.48%
app/main.go	3	15	20.0%

Totals
Change from base Build 4360549357:	-0.7%
Covered Lines:	239
Relevant Lines:	392

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💛 - Coveralls