[+] introduce new type metrics.MetricIntervals

[pashagolub]

We want to change it to map[string]int instead of map[string]float64 and use the type name everywhere in code base to make the purpose of vars obvious

[coveralls]

Pull Request Test Coverage Report for Build 23243112556

Details

• 5 of 5 (100.0%) changed or added relevant lines in 4 files are covered.
• 35 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.6%) to 83.48%

---

Files with Coverage Reduction	New Missed Lines	%
internal/reaper/reaper.go	4	37.04%
internal/reaper/logparser_remote.go	31	34.91%

Totals
Change from base Build 23228867861:	-0.6%
Covered Lines:	4568
Relevant Lines:	5472

---

💛 - Coveralls