take account how default works, and fix regression

library/common-test/tests/cnpg/cluster_spec_test.yaml

@@ -62,7 +62,7 @@ tests:
                   name: test-release-name-common-test-cnpg-my-pg-user
                 database: test-db
                 owner: test-user
-                dataChecksums: false
+                dataChecksums: true
 
   - it: should override options
     set:
@@ -80,7 +80,7 @@ tests:
             logLevel: debug
             instances: 3
             initdb:
-              dataChecksums: true
+              dataChecksums: false
               encoding: some-encoding
               localeCollate: some-locale
               localeCtype: some-locale
@@ -155,7 +155,7 @@ tests:
                   name: test-release-name-common-test-cnpg-my-pg-user
                 database: test-db
                 owner: test-user
-                dataChecksums: true
+                dataChecksums: false
                 encoding: some-encoding
                 localeCollate: some-locale
                 localeCtype: some-locale
@@ -270,7 +270,7 @@ tests:
                   name: test-release-name-common-test-cnpg-my-pg-user
                 database: app
                 owner: app
-                dataChecksums: false
+                dataChecksums: true
                 postInitApplicationSQL:
                   - CREATE EXTENSION IF NOT EXISTS some-extension;
                   - CREATE EXTENSION IF NOT EXISTS timescaledb;

library/common/templates/lib/cnpg/cluster/_bootstrapStandalone.tpl

@@ -6,7 +6,7 @@
   {{- $postInitSQL := list -}}
   {{- $postInitTemplateSQL := list -}}
   {{- $postInitApplicationSQL := list -}}
-  {{- $dataChecksums := false -}}
+  {{- $dataChecksums := true -}}
   {{- if not (hasKey $objectData.cluster "initdb") -}}
     {{- $_ := set $objectData.cluster "initdb" dict -}}
   {{- end -}}
@@ -38,7 +38,7 @@ initdb:
     name: {{ printf "%s-user" $objectData.clusterName }}
   database: {{ $objectData.database }}
   owner: {{ $objectData.user }}
-  dataChecksums: {{ $dataChecksums | default true }}
+  dataChecksums: {{ $dataChecksums }}
   {{- with $objectData.cluster.initdb.encoding }}
   encoding: {{ . }}
   {{- end -}}