fix: increase hbase master memory to avoid the hbase shell being killed

Author: razvan

docs/modules/demos/pages/hbase-hdfs-load-cycling-data.adoc

@@ -22,7 +22,7 @@ WARNING: This demo should not be run alongside other demos.
 To run this demo, your system needs at least:
 
 * 3 {k8s-cpu}[cpu units] (core/hyperthread)
-* 6GiB memory
+* 7GiB memory
 * 16GiB disk storage
 
 == Overview

stacks/hdfs-hbase/hbase.yaml

@@ -12,6 +12,10 @@ spec:
   masters:
     config:
       listenerClass: external-stable
+      config:
+        resources:
+          memory:
+            limit: 2Gi
     roleGroups:
       default:
         replicas: 1