Add memory limits to neo4j deployment

I cannot increase the memory above "2G" without getting an error that no
node has capacity for it. So I believe we have to change the kubernetes
cluster if we want to assign more memory to neo4j.

The other settings were suggested to me by neo4j-admin memrec:
https://neo4j.com/docs/operations-manual/current/tools/neo4j-admin-memrec/

deployment/human-connection/deployment-neo4j.yaml

@@ -25,13 +25,20 @@
         - name: nitro-neo4j
           image: humanconnection/neo4j:latest
           imagePullPolicy: Always
+          resources:
+            requests:
+              memory: "1G"
+            limits:
+              memory: "2G"
           env:
           - name: NEO4J_apoc_import_file_enabled
             value: "true"
           - name: NEO4J_dbms_memory_pagecache_size
-            value: 1G
+            value: "490M"
           - name: NEO4J_dbms_memory_heap_max__size
-            value: 1G
+            value: "500M"
+          - name: NEO4J_dbms_memory_heap_initial__size
+            value: "500M"
           - name: NEO4J_dbms_security_procedures_unrestricted
             value: "algo.*,apoc.*"
           envFrom: