grafana: don't use bool for refresh

grafyaml actually knows this is deprecated, but it's actually more
than that and doesn't work to refresh the variable at all now.  "1"
means "on load" which is what we want.

Change-Id: I34ecdd30c2188cb7e6ec32e33c6a6e99b6240934

grafana/nodepool-airship-citycloud.yaml

@@ -9,7 +9,7 @@ dashboard:
       includeAll: true
       multi: true
       query: stats.gauges.nodepool.provider.airship-*
-      refresh: true
+      refresh: 1
       type: query
   rows:
     - title: Description

grafana/nodepool-inap.yaml

@@ -9,7 +9,7 @@ dashboard:
       includeAll: true
       multi: true
       query: stats.gauges.nodepool.provider.inap-*
-      refresh: true
+      refresh: 1
       type: query
   rows:
     - title: Description

grafana/nodepool-limestone.yaml

@@ -9,7 +9,7 @@ dashboard:
       includeAll: true
       multi: true
       query: stats.gauges.nodepool.provider.limestone-*
-      refresh: true
+      refresh: 1
       type: query
   rows:
     - title: Description

grafana/nodepool-linaro.yaml

@@ -9,7 +9,7 @@ dashboard:
       includeAll: true
       multi: true
       query: stats.gauges.nodepool.provider.linaro-*
-      refresh: true
+      refresh: 1
       type: query
   rows:
     - title: Description

grafana/nodepool-openedge.yaml

@@ -9,7 +9,7 @@ dashboard:
       includeAll: true
       multi: true
       query: stats.gauges.nodepool.provider.openedge-*
-      refresh: true
+      refresh: 1
       type: query
   rows:
     - title: Description

grafana/nodepool-ovh.yaml

@@ -9,7 +9,7 @@ dashboard:
       includeAll: true
       multi: true
       query: stats.gauges.nodepool.provider.ovh-*
-      refresh: true
+      refresh: 1
       type: query
   rows:
     - title: Description

grafana/nodepool-rax.yaml

@@ -9,7 +9,7 @@ dashboard:
       includeAll: true
       multi: true
       query: stats.gauges.nodepool.provider.rax-*
-      refresh: true
+      refresh: 1
       type: query
   rows:
     - title: Description

grafana/nodepool-vexxhost.yaml

@@ -9,7 +9,7 @@ dashboard:
       includeAll: true
       multi: true
       query: stats.gauges.nodepool.provider.vexxhost-*
-      refresh: true
+      refresh: 1
       type: query
   rows:
     - title: Description

grafana/nodepool.template

@@ -9,7 +9,7 @@ dashboard:
       includeAll: true
       multi: true
       query: stats.gauges.nodepool.provider.%STAT_LIST%
-      refresh: true
+      refresh: 1
       type: query
   rows:
     - title: Description