Add postgres_extra_settings (#2071)

* Add hacking/ directory to .gitignore as it is commonly used for dev scripts
* Add postgres_extra_settings
* Add postgres_configuration_secret checksum to DB statefulset
* Docs for postgres_extra_settings, CI coverage, and examples
---------
Co-authored-by: Christian M. Adams <chadams@redhat.com>

config/crd/bases/awx.ansible.com_awxs.yaml

@@ -1828,9 +1828,25 @@ spec:
                 description: Assign a preexisting priority class to the postgres pod
                 type: string
               postgres_extra_args:
+                description: "(Deprecated, use postgres_extra_settings parameter) Define postgres configuration arguments to use"
                 type: array
                 items:
                   type: string
+              postgres_extra_settings:
+                description: "PostgreSQL configuration settings to be added to postgresql.conf"
+                type: array
+                items:
+                  type: object
+                  properties:
+                    setting:
+                      description: "PostgreSQL configuration parameter name"
+                      type: string
+                    value:
+                      description: "PostgreSQL configuration parameter value"
+                      type: string
+                  required:
+                    - setting
+                    - value
               postgres_data_volume_init:
                 description: Sets permissions on the /var/lib/pgdata/data for postgres container using an init container (not Openshift)
                 type: boolean

config/manifests/bases/awx-operator.clusterserviceversion.yaml

@@ -697,11 +697,16 @@ spec:
         x-descriptors:
         - urn:alm:descriptor:io.kubernetes:StorageClass
         - urn:alm:descriptor:com.tectonic.ui:advanced
-      - displayName: Postgres Extra Arguments
+      - displayName: Postgres Extra Arguments (Deprecated)
         path: postgres_extra_args
         x-descriptors:
         - urn:alm:descriptor:com.tectonic.ui:advanced
         - urn:alm:descriptor:com.tectonic.ui:hidden
+      - displayName: Postgres Extra Settings
+        path: postgres_extra_settings
+        x-descriptors:
+        - urn:alm:descriptor:com.tectonic.ui:advanced
+        - urn:alm:descriptor:com.tectonic.ui:hidden
       - description: Specify extra volumes to add to the postgres pod
         displayName: Postgres Extra Volumes
         path: postgres_extra_volumes