Remove line stacking where it does not make sense

Mainly this improves the cloud specific log dashboard displaying
error messages across multiple nodes in a cloud. There was a few
other graphs that stacked lines unnecessarily include as well.

Change-Id: I4ec8136b532e8aa1c00dc19b0892c383f15c194d

ansible/install/roles/grafana-dashboards/templates/baremetal_general_system_performance.json.j2

@@ -762,7 +762,7 @@
             "renderer": "flot",
             "seriesOverrides": [],
             "span": 12,
-            "stack": true,
+            "stack": false,
             "steppedLine": false,
             "targets": [
               {

ansible/install/roles/grafana-dashboards/templates/cloud_specific_log.json.j2

@@ -70,7 +70,7 @@
               "renderer": "flot",
               "seriesOverrides": [],
               "span": 12,
-              "stack": true,
+              "stack": false,
               "steppedLine": false,
               "targets": [
                 {

ansible/install/roles/grafana-dashboards/templates/graphite_general_system_performance.json.j2

@@ -762,7 +762,7 @@
             "renderer": "flot",
             "seriesOverrides": [],
             "span": 12,
-            "stack": true,
+            "stack": false,
             "steppedLine": false,
             "targets": [
               {

ansible/install/roles/grafana-dashboards/templates/guest_general_system_performance.json.j2

@@ -762,7 +762,7 @@
             "renderer": "flot",
             "seriesOverrides": [],
             "span": 12,
-            "stack": true,
+            "stack": false,
             "steppedLine": false,
             "targets": [
               {

ansible/install/roles/grafana-dashboards/templates/openstack_general_system_performance.json.j2

@@ -774,7 +774,7 @@
             "renderer": "flot",
             "seriesOverrides": [],
             "span": 12,
-            "stack": true,
+            "stack": false,
             "steppedLine": false,
             "targets": [
               {