[feature] change libnrm ratelimit in manifest

Add a "monitoring" section to the manifest, that allows users to modify
libnrm through environment variables.
19 jobs for ratelimit-manifest in 8 minutes and 11 seconds (queued for 1 minute)
Status Job ID Name Coverage
  Style
passed #21516
integration
flake8

00:00:16

 
  Build
passed #21520
integration
argotk

00:00:20

passed #21521
integration
buildAMG

00:02:08

passed #21524
integration
buildLAMMPS

00:00:08

passed #21522
integration
buildOpenMC

00:00:05

passed #21523
integration
buildSTREAM

00:00:04

passed #21519
integration
containers

00:00:15

passed #21518
integration
libnrm

00:00:15

passed #21517
integration
nrm

00:00:35

 
  Test
passed #21529
rapl
py.test

00:02:02

passed #21525
integration
testHello

00:00:13

passed #21526
integration
testListen

00:00:16

passed #21527
performance integration
testPerfwrapper

00:00:49

passed #21528
knl
testPower

00:00:50

 
  Applications
passed #21530
integration notknl
testAMG

00:00:19

passed #21533
integration notknl
testLAMMPS

00:00:19

passed #21532
integration notknl
testOpenMC

00:00:25

passed #21531
integration notknl
testSTREAM

00:00:22

 
  Quality
passed #21534
integration
repoquality

00:00:07