Disable presettled metrics

Our lab testing shows that message loss is unacceptably high when using
presettled mode for non-trivial metrics volumes. "unsettled" mode (the
alternative) has been shown to be 100% reliable while still acheiving equal or
greater overall max throughput in live testing with a baremetal cloud.

Change-Id: I9388994ee94ab1e3c3e15768a8eb96069c2d8a0b

ci/environments/scenario001-standalone.yaml

@@ -170,7 +170,7 @@ parameter_defaults:
       presettle: false
     telemetry:
       format: JSON
-      presettle: true
+      presettle: false
   LoggingServers:
     - host: 127.0.0.1
       port: 24224

environments/enable-stf.yaml

@@ -23,7 +23,7 @@ parameter_defaults:
       presettle: false
     telemetry:
       format: JSON
-      presettle: true
+      presettle: false
   MetricsQdrAddresses:
     - prefix: collectd
       distribution: multicast

environments/metrics/collectd-write-qdr.yaml

@@ -13,4 +13,4 @@ parameter_defaults:
       presettle: false
     telemetry:
       format: JSON
-      presettle: true
+      presettle: false