[-] fix --group command-line option, closes #792

[pashagolub]

Rewrite Reaper.LoadSources to properly handle Groups. Drop SourceConns.SyncFromReader() as obsolete. Add TestReaper_LoadSources tests.

[coveralls]

Pull Request Test Coverage Report for Build 15563934873

Details

• 9 of 14 (64.29%) changed or added relevant lines in 2 files are covered.
• 10 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.6%) to 61.135%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/log/log.go	0	5	0.0%

Files with Coverage Reduction	New Missed Lines	%
internal/sources/resolver.go	10	71.5%

Totals
Change from base Build 15561227899:	0.6%
Covered Lines:	2715
Relevant Lines:	4441

---

💛 - Coveralls