changed y-axis label for errors and discards graphs. RE POL1-509

brian_dashboard_manager/templating/templates/shared/yaxes.json.j2

 {% if type == 'errors' %}
 {
     "format": "none",
-    "label": "err/s",
+    "label": "errors and discards per second",
     "logBase": 1,
     "max": null,
     "min": 0,
@@ -9,7 +9,7 @@
 },
 {
     "format": "none",
-    "label": "err/s",
+    "label": "errors and discards per second",
     "logBase": 1,
     "max": null,
     "min": 0,
@@ -32,4 +32,4 @@
     "min": "",
     "show": true
 }
-{% endif %}
\ No newline at end of file
+{% endif %}