Fix zookeeper lint

Author: v-zhuravlev

zookeeper-observ-lib/.lint

@@ -0,0 +1,13 @@
+exclusions:
+  panel-units-rule:
+    entries:
+      - panel: Process files open
+  panel-datasource-rule:
+    entries:
+      - panel: GC duration
+      - panel: Allocated/promoted
+  target-instance-rule:
+    reason: Instance selector is intentionally dropped in these panels as they represent whole cluster.
+    entries:
+      - dashboard: ZooKeeper overview
+        panel: Current zookeeper role

zookeeper-observ-lib/config.libsonnet

@@ -1,7 +1,7 @@
 {
   local this = self,
   filteringSelector: 'job!=""',
-  groupLabels: ['cluster'],
+  groupLabels: ['job'],
   instanceLabels: ['instance'],
   uid: 'zookeeper',
   dashboardNamePrefix: '',