Merge branch 'fix-memory-heap-units' into 'master'

Juniper.JUNOS.get_metrics. Fix units on  'Memory | Heap' metrics

See merge request !6833

(cherry picked from commit 655e9815)

82dbfa96 Juniper.JUNOS.get_metrics. 'Memory | Heap'
7 jobs for !6835 with cherry-pick-655e9815 in 15 minutes and 29 seconds (queued for 5 seconds)
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