fix(pulse-plugin): fixed permitted intervals format (#1617)

[coveralls]

Pull Request Test Coverage Report for Build 1746

• 8 of 25 (32.0%) changed or added relevant lines in 6 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.04%) to 53.614%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/app/pulse/charts/pulse-chart.ts	1	3	33.33%
src/app/pulse/vm-pulse/vm-pulse.component.ts	3	6	50.0%
src/app/pulse/charts/pulse-cpu-ram-chart/pulse-cpu-ram-chart.component.ts	1	5	20.0%
src/app/pulse/charts/pulse-disk-chart/pulse-disk-chart.component.ts	1	5	20.0%
src/app/pulse/charts/pulse-network-chart/pulse-network-chart.component.ts	1	5	20.0%
<!--	Total:	8	25	32.0%	-->

Files with Coverage Reduction	New Missed Lines	%
src/app/pulse/charts/pulse-disk-chart/pulse-disk-chart.component.ts	1	21.54%
src/app/pulse/charts/pulse-cpu-ram-chart/pulse-cpu-ram-chart.component.ts	1	17.31%
<!--	Total:	2		-->

Totals
Change from base Build 1739:	-0.04%
Covered Lines:	9515
Relevant Lines:	15756

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💛 - Coveralls